Convenient, Mild Catalytic Deprotection of Oximes to Carbonyl Compounds with Hydrogen Peroxide and Iodine Catalyst in Aqueous Acetonitrile
作者:Nemai C. Ganguly、Subhasis Nayek、Sujoy Kumar Barik
DOI:10.1080/00397910902883678
日期:2009.10.21
Abstract A clean, mild, and efficient catalytic deoximation procedure compatible with several common functional groups has been developed using 30% hydrogenperoxide activated by iodine catalyst in aqueous acetonitrile under essentially neutral conditions. The mechanistic features of an iodonium ion–driven nucleophilic cleavage of oximic C˭N have been revealed.
Process for the production of optically active amino alcohols
申请人:Takasago International Corporation
公开号:EP1398310A1
公开(公告)日:2004-03-17
The disclosure describes a process for the preparation of cyclic optically active amino alcohols of formula (I) by reacting an optically active hydroxycarboxylate of formula (IV) with hydrazine to form an optically active hydroxycarboxylic hydrazide compound of formula (III), then conducting a Curtius reaction in the presence of an alcohol to give an optically active alkoxycarbonylamino alcohol of formula (II), followed by deprotecting the amino group to form the amino alcohol of formula (I).
The variables A1, A2, R1-R6, m, n and * are as defined in the claims.