《AuCl3-Catalyzed Ring-Closing Carbonyl-Olefin Metathesis》 was published in Chemistry – A European Journal in 2020. These research results belong to Wang, Rui; Chen, Yi; Shu, Mao; Zhao, Wenwen; Tao, Maoling; Du, Chao; Fu, Xiaoya; Li, Ao; Lin, Zhihua. SDS of cas: 70-55-3 The article mentions the following:
A highly efficient AuCl3-catalyzed intramol. ring-closing carbonyl-olefin metathesis reaction is described. This method features easily accessible starting materials, simple operation, good functional-group tolerance and short reaction times, and provides the target cyclopentenes I (R = C(O)OEt, Ph, COPh, CONHPh; Ar = Ph, 3-methoxyphenyl, furan-2-yl, etc.), polycycles e.g., II, benzocarbocycles e.g., III, and N-heterocycle derivatives IV (R1 = Ph, 4-fluorophenyl, naphthalen-2-yl, etc.) in good to excellent yields.4-Methylbenzenesulfonamide(cas: 70-55-3SDS of cas: 70-55-3) was used in this study.
4-Methylbenzenesulfonamide(cas: 70-55-3) belongs to anime. Nitrous acid converts secondary amines (aliphatic or aromatic) to N-nitroso compounds (nitrosamines): R2NH + HNO2 → R2N―NO. Some nitrosamines are potent cancer-inducing substances, and their possible formation is a serious consideration when nitrites, which are salts of nitrous acid, are present in foods or pharmaceutical preparations. Tertiary amines give rise to nitrosamines more slowly; an alkyl group is eliminated as an aldehyde or ketone, along with nitrous oxide, N2O.SDS of cas: 70-55-3
Referemce:
Amide – Wikipedia,
Amide – an overview | ScienceDirect Topics