Catalytic, Enantioselective N-Acylation of Lactams and Thiolactams Using Amidine-Based Catalysts
作者:Xing Yang、Valentina D. Bumbu、Peng Liu、Ximin Li、Hui Jiang、Eric W. Uffman、Lei Guo、Wei Zhang、Xuntian Jiang、K. N. Houk、Vladimir B. Birman
DOI:10.1021/ja306766n
日期:2012.10.24
contrast to alcohols and amines, racemic lactams and thiolactams cannot be resolved directly via enzymatic acylation or classical resolution. Asymmetric N-acylation promoted by amidine-based catalysts, particularly Cl-PIQ 2 and BTM 3, provides a convenient method for the kinetic resolution of these valuable compounds and often achieves excellent levels of enantioselectivity in this process. Density
Abstract Thiocarbonyl compounds, such as thioaldehydes and thioketones, are good dienophiles in the Diels-Alderreaction. Here we show that suitably substituted thioformamides can also be used in this reaction. A theoretical study of the [4π + 2π] cycloaddition of thiocarbonyls with butadiene has been performed and was used to determine the needed substituents.
INSECTICIDAL DERIVATIVES OF SUBSTITUTED BENZYLAMINES
申请人:Arnold Christian
公开号:US20110124647A1
公开(公告)日:2011-05-26
The present invention relates to novel derivatives of substituted benzylamines, to processes for their preparation and to their use for controlling animal pests, especially arthropods, in particular insects.
Herbicide and plant growth regulator comprising alpha-beta-unsaturated compound
申请人:TEIJIN LIMITED
公开号:EP0104432A2
公开(公告)日:1984-04-04
A herbicide comprising as an active ingredient an α,β-unsaturated compound of the following formula (I)
wherein each of R' and R2 represents CN, NO2, a halogen, a C1-25 alkoxy or alkylthio, a group of the formula
in which Z' represents C1-25 alkyl or a phenyl, a group of the formula
in which X's represent an oxygen or sulfur atom and Z2 represents hydrogen, one equivalent of a cation, C1-25 alkyl, a phenyl or a phenyl (C1-25 alkyl), a group of the formula