52-90-4, Name is L-Cysteine, molecular formula is C3H7NO2S, belongs to amides-buliding-blocks compound, is a common compound. In a patnet, author is Hwang, Keum Saem, once mentioned the new application about 52-90-4, Computed Properties of https://www.ambeed.com/products/52-90-4.html.
This review covers further applications of the conjugate addition of enantiomerically pure lithium amides as chiral ammonia equivalents in asymmetric synthesis and provides an update since our last review of this area, which was published in 2012. (C) 2017 Published by Elsevier Ltd.
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Reference:
Amide – Wikipedia,
,Amide – an overview | ScienceDirect Topics