Month: October 2022

Siddiki, S. M. A. Hakim; Rashed, Nurnobi Md.; Touchy, Abeda Sultana; Jamil, A. R. Md.; Jing, Yuan; Toyao, Takashi; Maeno, Zen; Shimizu, Ken-ichi published their research in Catalysis Science & Technology in 2021. The article was titled 《Hydrolysis of amides to carboxylic acids catalyzed by Nb2O5》.Reference of N-Methoxy-N-methylacetamide The article contains the following contents:

Hydrolysis of amides RC(O)N(R1)R2 (R = Me, cyclohexyl, Ph, Bn, furan-2-yl, etc.; R1 = H, Me, Et, OMe; R2 = H, Me, Et, Ph, Bn) to carboxylic acids RC(O)OH is an industrially important reaction but is challenging due to the difficulty of cleaving the resonance stabilized amidic C-N bond. Twenty-three heterogeneous and homogenous catalysts were examined in the hydrolysis of acetamide. Results showed that Nb2O5 was the most effective heterogeneous catalyst with the greatest yield of acetic acid. A series of Nb2O5 catalysts calcined at various temperatures were characterized and tested in the hydrolysis of acetamide to determine the effects of crystal phase and surface properties of Nb2O5 on catalytic performance. The high catalytic performance observed was attributed mainly to the facile activation of the carbonyl bond by Lewis acid sites that function even in the presence of basic inhibitors (NH3 and H2O). The catalytic studies showed the synthetic advantages of the present method, such as simple operation, catalyst recyclability, additive free, solvent-free, and wide substrate scope (>40 examples; up to 95% isolated yield). In the experimental materials used by the author, we found N-Methoxy-N-methylacetamide(cas: 78191-00-1Reference of N-Methoxy-N-methylacetamide)

N-Methoxy-N-methylacetamide(cas: 78191-00-1) belongs to anime. Halogenation, in which one or more hydrogen atoms of an amine is replaced by a halogen atom, occurs with chlorine, bromine, and iodine, as well as with some other reagents, notably hypochlorous acid (HClO). With primary amines the reaction proceeds in two stages, producing N-chloro- and N,N-dichloro-amines, RNHCl and RNCl2, respectively. With tertiary amines, an alkyl group may be displaced by a halogen.Reference of N-Methoxy-N-methylacetamide

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Ren, Zhiqiang; Sun, Zhongliu; Li, Yifei; Fan, Xin; Dai, Mingda; Wang, Yunxia; Hu, Xiangdong published their research in Angewandte Chemie, International Edition in 2021. The article was titled 《Total Synthesis of (+)-3-Deoxyfortalpinoid F, (+)-Fortalpinoid A, and (+)-Cephinoid H》.Category: amides-buliding-blocks The article contains the following contents:

3-Deoxyfortalpinoid F, fortalpinoid A, and cephinoid H are members of the Cephalotaxus diterpenoids class of natural products, which feature diverse chem. structures and valuable biol. activities. We report herein the development of a diastereoselective Pauson-Khand reaction as an effective pathway to access the core tetracyclic skeleton, which is found widely in Cephalotaxus diterpenoids. Furthermore, we enabled the construction of the tropone moiety through a ring-closing metathesis/elimination protocol. Based on the developed strategy, asym. synthesis of the title compounds has been achieved for the first time. In the experiment, the researchers used N-Methoxy-N-methylacetamide(cas: 78191-00-1Category: amides-buliding-blocks)

N-Methoxy-N-methylacetamide(cas: 78191-00-1) belongs to anime. Large quantities of aliphatic amines are made synthetically. The most widely used industrial method is the reaction of alcohols with ammonia at a high temperature, catalyzed by metals or metal oxide catalysts (e.g., nickel or copper). Mixtures of primary, secondary, and tertiary amines are thereby produced.Category: amides-buliding-blocks

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

《Solubility and partitioning. I: Solubility of nonelectrolytes in water》 was written by Yalkowsky, Samuel H.; Valvani, Shri C.. HPLC of Formula: 4746-61-6 And the article was included in Journal of Pharmaceutical Sciences on August 31 ,1980. The article conveys some information:

Semiempirical anal. gave an equation that enables the estimation of the aqueous solubility of either liquid or crystalline organic nonelectrolytes: log Sw ≈ -1.00 log PC – 1.11[ΔSf(MP-25)/1364] + 0.54 where log PC and ΔSf are estimated from the chem. structure and MP is either known or exptl. determined Anal. of this equation provides a means of assessing the role of crystal structure [as reflected by the m.p. (MP) and the entropy of fusion (ΔSf)] and of the activity coefficient [as reflected by the octanol-water partition coefficient (PC)] in controlling the aqueous solubility of a drug. Techniques are also provided for estimating the entropy of fusion of organic compounds In the experiment, the researchers used many compounds, for example, 2-Hydroxy-N-phenylacetamide(cas: 4746-61-6HPLC of Formula: 4746-61-6)

2-Hydroxy-N-phenylacetamide(cas: 4746-61-6) belongs to amides.HPLC of Formula: 4746-61-6 Amides include many other important biological compounds, as well as many drugs like paracetamol, penicillin and LSD. Low-molecular-weight amides, such as dimethylformamide, are common solvents.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Computed Properties of C13H26N2O4On November 7, 2010 ,《Tin(II) chloride assisted synthesis of N-protected γ-amino β-keto esters through semipinacol rearrangement》 appeared in Organic & Biomolecular Chemistry. The author of the article were Bandyopadhyay, Anupam; Agrawal, Neha; Mali, Sachitanand M.; Jadhav, Sandip V.; Gopi, Hosahudya N.. The article conveys some information:

A facile synthetic route for the preparation of N-protected γ-amino β-keto esters from amino aldehydes and Et diazoacetate is described. The two component coupling is facilitated by tin(II) chloride followed by semipinacol rearrangement leading to the product in quant. yield. The reaction is mild, instantaneous and compatible with Boc-, Fmoc- and Cbz-amino protecting groups. In the experiment, the researchers used (S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide(cas: 87694-50-6Computed Properties of C13H26N2O4)

(S)-N-Methyl-N-methoxy-2-(tert-butoxycarbonylamino)-4-methylpentanamide(cas: 87694-50-6) belongs to amides.Computed Properties of C13H26N2O4 Amides include many other important biological compounds, as well as many drugs like paracetamol, penicillin and LSD. Low-molecular-weight amides, such as dimethylformamide, are common solvents.

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

Knauer, Sascha; Koch, Niklas; Uth, Christina; Meusinger, Reinhard; Avrutina, Olga; Kolmar, Harald published an article in Angewandte Chemie, International Edition. The title of the article was 《Sustainable peptide synthesis enabled by a transient protecting group》.HPLC of Formula: 2418-95-3 The author mentioned the following in the article:

The growing interest in synthetic peptides has prompted the development of viable methods for their sustainable production Currently, large amounts of toxic solvents are required for peptide assembly from protected building blocks, and switching to water as a reaction medium remains a major hurdle in peptide chem. We report an aqueous solid-phase peptide synthesis strategy that is based on a water-compatible 2,7-disulfo-9-fluorenylmethoxycarbonyl (Smoc) protecting group. This approach enables peptide assembly under aqueous conditions, real-time monitoring of building block coupling, and efficient postsynthetic purification The procedure for the synthesis of all natural and several non-natural Smoc-protected amino acids is described, as well as the assembly of 22 peptide sequences and the fundamental issues of SPPS, including the protecting group strategy, coupling and cleavage efficiency, stability under aqueous conditions, and crucial side reactions. In the experiment, the researchers used H-Lys(Boc)-OH(cas: 2418-95-3HPLC of Formula: 2418-95-3)

H-Lys(Boc)-OH(cas: 2418-95-3) belongs to amino acids. In addition to subunits of proteins, amino acids have many other functions as well, including osmoregulation (proline), neurotransmitters (gamma-aminobutyric acid), metabolic intermediates (ornithine and citrulline), and inhibitors (dehydroproline).HPLC of Formula: 2418-95-3

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

The author of 《Efficient Electrocatalysis for the Preparation of (Hetero)aryl Chlorides and Vinyl Chloride with 1,2-Dichloroethane》 were Liang, Yujie; Lin, Fengguirong; Adeli, Yeerlan; Jin, Rui; Jiao, Ning. And the article was published in Angewandte Chemie, International Edition in 2019. Related Products of 247170-19-0 The author mentioned the following in the article:

Although the application of 1,2-dichloroethane (DCE) as a chlorinating reagent in organic synthesis with the concomitant release of vinyl chloride as a useful byproduct is a fantastic idea, it still presents a tremendous challenge and has not yet been achieved because of the harsh dehydrochlorination conditions and the sluggish C-H chlorination process. Here we report a bifunctional electrocatalysis strategy for the catalytic dehydrochlorination of DCE at the cathode simultaneously with anodic oxidative aromatic chlorination using the released HCl as the chloride source for the efficient synthesis of value-added (hetero)aryl chlorides. The mildness and practicality of the protocol was further demonstrated by the efficient late-stage chlorination of bioactive mols. After reading the article, we found that the author used N-(2-Chloro-4-(trifluoromethyl)phenyl)acetamide(cas: 247170-19-0Related Products of 247170-19-0)

N-(2-Chloro-4-(trifluoromethyl)phenyl)acetamide(cas: 247170-19-0) belongs to anime. Amine, any member of a family of nitrogen-containing organic compounds that is derived, either in principle or in practice, from ammonia (NH3). Naturally occurring amines include the alkaloids, which are present in certain plants; the catecholamine neurotransmitters (i.e., dopamine, epinephrine, and norepinephrine); and a local chemical mediator, histamine, that occurs in most animal tissues.Related Products of 247170-19-0

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

The author of 《Site-Specific Encoding of Photoactivity in Antibodies Enables Light-Mediated Antibody-Antigen Binding on Live Cells》 were Bridge, Thomas; Shaikh, Saher A.; Thomas, Paul; Botta, Joaquin; McCormick, Peter J.; Sachdeva, Amit. And the article was published in Angewandte Chemie, International Edition in 2019. Safety of H-Lys(Boc)-OH The author mentioned the following in the article:

Antibodies found applications in several fields, including, medicine, diagnostics, and nanotechnol., yet methods to modulate antibody-antigen binding using an external agent remain limited. Here, the authors have developed photoactive antibody fragments by genetic site-specific replacement of single tyrosine residues with photocaged tyrosine, in an antibody fragment, 7D12. A simple and robust assay is adopted to evaluate the light-mediated binding of 7D12 mutants to its target, epidermal growth factor receptor (EGFR), on the surface of cancer cells. Presence of photocaged tyrosine reduces 7D12-EGFR binding affinity by over 20-fold in two out of three 7D12 mutants studied, and binding is restored upon exposure to 365 nm light. Mol. dynamics simulations explain the difference in effect of photocaging on 7D12-EGFR interaction among the mutants. Finally, the authors demonstrate the application of photoactive antibodies in delivering fluorophores to EGFR-pos. live cancer cells in a light-dependent manner. In the experimental materials used by the author, we found H-Lys(Boc)-OH(cas: 2418-95-3Safety of H-Lys(Boc)-OH)

H-Lys(Boc)-OH(cas: 2418-95-3) belongs to amino acids. In addition to subunits of proteins, amino acids have many other functions as well, including osmoregulation (proline), neurotransmitters (gamma-aminobutyric acid), metabolic intermediates (ornithine and citrulline), and inhibitors (dehydroproline).Safety of H-Lys(Boc)-OH

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

The author of 《Synthesis and evaluation of new protein-tyrosine kinase inhibitors. Part 1. Pyridine-containing stilbenes and amides》 were Cushman, Mark; Nagarathnam, Dhanapalan; Gopal, D.; Geahlen, Robert L.. And the article was published in Bioorganic & Medicinal Chemistry Letters in 1991. Related Products of 64479-78-3 The author mentioned the following in the article:

A series of pyridine-containing stilbene and amide derivatives based on the structure of piceatannol, a naturally occurring protein-tyrosine kinase inhibitor, were prepared and tested for inhibition of p56lck. The most potent of these compounds (I) is a competitive inhibitor of p56lck with respect to ATO. The experimental part of the paper was very detailed, including the reaction process of N-(Pyridin-4-yl)isonicotinamide(cas: 64479-78-3Related Products of 64479-78-3)

N-(Pyridin-4-yl)isonicotinamide(cas: 64479-78-3) belongs to amides. Because of the greater electronegativity of oxygen, the carbonyl (C=O) is a stronger dipole than the N–C dipole. The presence of a C=O dipole and, to a lesser extent a N–C dipole, allows amides to act as H-bond acceptors.“,” In primary and secondary amides, the presence of N–H dipoles allows amides to function as H-bond donors as well. Related Products of 64479-78-3

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

In 2018,Science (Washington, DC, United States) included an article by Trost, Barry M.; Huang, Zhongxing; Murhade, Ganesh M.. HPLC of Formula: 78191-00-1. The article was titled 《Catalytic palladium-oxyallyl cycloaddition》. The information in the text is summarized as follows:

Exploration of intermediates that enable chemoselective cycloaddition reactions and expeditious construction of fused- or bridged-ring systems is a continuous challenge for organic synthesis. As an intermediate of interest, the oxyallyl cation was harnessed to synthesize architectures containing seven-membered rings via (4+3) cycloaddition However, its potential to access five-membered skeletons is underdeveloped, largely due to the thermally forbidden (3+2) pathway. Here, the combination of a tailored precursor and a Pd(0) catalyst generates a Pd-oxyallyl intermediate that cyclizes with conjugated dienes to produce a diverse array of THF skeletons. The cycloaddition overrides conventional (4+3) selectivity by proceeding through a stepwise pathway involving a Pd-allyl transfer and ring closure sequence. Subsequent treatment of the (3+2) adducts with a palladium catalyst converts the heterocycles to the carbocyclic cyclopentanones. In the experiment, the researchers used many compounds, for example, N-Methoxy-N-methylacetamide(cas: 78191-00-1HPLC of Formula: 78191-00-1)

N-Methoxy-N-methylacetamide(cas: 78191-00-1) belongs to anime. Reaction with nitrous acid (HNO2), which functions as an acylating agent that is a source of the nitrosyl group (―NO), converts aliphatic primary amines to nitrogen and mixtures of alkenes and alcohols corresponding to the alkyl group in a complex process. This reaction has been used for analytical determination of primary amino groups in a procedure known as the Van Slyke method.HPLC of Formula: 78191-00-1

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics

In 2019,Environmental Toxicology and Chemistry included an article by Holmes, Breanne E.; Smeester, Lisa; Fry, Rebecca C.; Weinberg, Howard S.. Recommanded Product: 2-Bromoacetamide. The article was titled 《Disinfection byproducts bind human estrogen receptor-α》. The information in the text is summarized as follows:

Disinfection byproducts are formed during most drinking water treatment and presently number >800, some of which are implicated in human health outcomes including bladder cancer and infertility, with unknown mechanisms of action. In particular, it is not yet understood whether these compounds can disrupt the estrogen-signaling pathway through binding to the human estrogen receptor (ER). In the present study, 21 disinfection byproducts, selected for their predicted involvement in endocrine-related diseases and their structural diversity, were individually evaluated for their binding affinity to the human ER and in silico, and then a subset of these chems. was studied in binary mixtures with the known weak estrogen, 4-n-nonylphenol. Individually, 9 of the 21 disinfection byproducts were able to weakly bind to the ER, with affinities ranging from log median inhibitory concentration values of -3.83 to -2.19 M. In binary mixtures, the chems. followed concentration addition, with their weak binding affinities having little contribution to the overall mixture affinity. These results demonstrate the variety of small-mol. disinfection byproduct structures that are capable of binding to the ER, and that their weak binding can still be of importance when overall human exposure to mixtures of disinfection byproducts in disinfected drinking water is considered. Environ Toxicol Chem 2019;9999:1-9. © 2019 SETAC. After reading the article, we found that the author used 2-Bromoacetamide(cas: 683-57-8Recommanded Product: 2-Bromoacetamide)

2-Bromoacetamide(cas: 683-57-8) can be used in preparation of (2-carbamoylmethoxy-5-chloro-benzyl)-carbamic acid tert-butyl ester. It was aslo used as precursor to dehydropeptidase I inactivator.Recommanded Product: 2-Bromoacetamide

Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics