Construction of Benzo-1,2,3-thiazaphosphole Heterocycles by Annulations of <i>ortho</i>-Phosphinoarenesulfonyl Fluorides with Trimethylsilyl Azide
作者:Wenjun Luo、Zhenguo Wang、Xiaohui Cao、Dacheng Liang、Mingjie Wei、Keshu Yin、Le Li
DOI:10.1021/acs.joc.0c01309
日期:2020.11.20
Annulations of ortho-phosphinoarenesulfonyl fluorides with trimethylsilylazide were developed to access an unprecedented benzo-1,2,3-thiazaphosphole heterocycle. A corresponding reaction mechanism was proposed and further elucidated by experimental and computational studies. The reaction proceeds through a Staudinger-type iminophosphorane intermediate followed by intramolecular trapping with sulfonyl
Asymmetric Morita-Baylis-Hillman Reaction: Catalyst Development and Mechanistic Insights Based on Mass Spectrometric Back-Reaction Screening
作者:Patrick G. Isenegger、Florian Bächle、Andreas Pfaltz
DOI:10.1002/chem.201604616
日期:2016.12.5
Morita–Baylis–Hillman (MBH) reaction was developed. By massspectrometric back‐reactionscreening of quasi‐enantiomeric MBH products, an efficient bifunctional phosphine catalyst was identified that outperforms literature‐known catalysts in the MBH reaction of methyl acrylate with aldehydes. The close match between the selectivities measured for the forward and back reaction and kinetic measurements provided
Process for the preparation of enantiomerically enriched cyclic beta-aryl or heteroaryl carbocyclic acids
申请人:Bachmann Stephan
公开号:US20070232653A1
公开(公告)日:2007-10-04
The present invention relates to a process for the preparation of cis substituted cyclic β-aryl or heteroaryl carboxylic acid derivatives in high diastereo- and enantioselectivity by enantioselective hydrogenation in accordance with the following scheme
wherein
X, Ar, n, and m are defined herein and corresponding salts thereof.
ALPHA-SUBSTITUTED ACRYLATE ESTERS, COMPOSITION CONTAINING THEREOF, AND METHOD FOR PRODUCING THOSE
申请人:Kawamoto Takahiro
公开号:US20130072712A1
公开(公告)日:2013-03-21
A method for producing α-substituted acrylate esters is provided which can be suitably used as an industrial method for producing α-substituted acrylate esters because the method does not have problems of apparatus corrosion or does not require waste detoxification and allows reaction in a short time with high yield. The method for producing an α-substituted acrylate ester includes a step of carrying out a reaction of a compound having a specific structure and an active hydrogen-containing compound under a condition where a tertiary amine and an acid and/or a salt thereof coexist.