A CONVENIENT SYNTHESIS OF KETOXIMES FROM GRIGNARD REAGENTS AND NITRO COMPOUNDS ACTIVATED BY<i>N</i>,<i>N</i>-DIMETHYLCHLOROMETHYLENIMINIUM CHLORIDE
作者:Tamotsu Fujisawa、Yoshitsugu Kurita、Toshio Sato
DOI:10.1246/cl.1983.1537
日期:1983.10.5
Ketoximes were synthesized in high yields with a newcarbon–carbonbondformation by regioselective nucleophilic attack of Grignard reagents at the α-position of aci-nitroalkanes activated by N,N-dimethylchloromethyleniminium chloride in the presence of a catalytic amount of copper(I) iodide under mild conditions.
Polystyrene-supported phosphine oxide-catalysed Beckmann rearrangement of ketoximes in 1,1,1,3,3,3-hexafluoro-2-propanol
作者:Yaoyao Wang、Qun Chen、Mingyang He、Liang Wang
DOI:10.1080/10426507.2018.1539489
日期:2019.3.4
Abstract A polystyrene-supported phosphine oxide-catalysed Beckmannrearrangement of ketoximes in 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP) has been developed. Good substrate compatibility, mild reaction conditions, good yields as well as the reusability of the catalyst/solvent made this procedure more environmentally benign. GRAPHICAL ABSTRACT
Preparation of stereochemically pure oximes with muscarinic activity
申请人:Warner-Lambert Company
公开号:US05514812A1
公开(公告)日:1996-05-07
The instant invention is a selective formation of the Z-oxime and O-alkylation of 1-azabicyclo 2.2.1!heptan-3-one and 1-azabicyclo 2.2.2!heptan-3-one oximes to produce compounds with muscarinic activity. The process is capable of scale-up for industrial purposes as it provides better yields and ease of preparation. Intermediates are also described.