Catalytic Asymmetric Epoxidation of Aldehydes with Two VANOL-Derived Chiral Borate Catalysts
作者:Anil K. Gupta、Xiaopeng Yin、Munmun Mukherjee、Aman A. Desai、Aliakbar Mohammadlou、Kelsee Jurewicz、William D. Wulff
DOI:10.1002/anie.201809511
日期:2019.3.11
A highly diastereo‐ and enantioselective method for the epoxidation of aldehydes with α‐diazoacetamides has been developed with two different borate ester catalysts of VANOL. Both catalytic systems are general for aromatic, aliphatic, and acetylenic aldehydes, giving high yields and inductions for nearly all cases. One borate ester catalyst has two molecules of VANOL and the other only one VANOL. Catalysts
A highly enantioselective Darzens reaction between diazoacetamides and aldehydes catalyzed by a (+)-pinanediol–Ti(OiPr)4 system
作者:Gang Liu、Daming Zhang、Jian Li、Guangyang Xu、Jiangtao Sun
DOI:10.1039/c2ob27179f
日期:——
A highly efficient enantioselective Darzens reaction of aldehydes with diazoacetamides catalyzed by a (+)-pinanediol–Ti(OiPr)4 system has been developed. The cis-glycidic amides were obtained in high yields and with moderate to excellent enantioselectivity (up to 99%).
已经开发了由(+)-ane二醇-Ti(O i Pr)4系统催化的醛与重氮乙酰胺的高效对映选择性Darzens反应。所述CIS以高收率得到,并与中度至良好的对映选择性(高达99%) -缩水甘油酰胺。
Bodforss, Chemische Berichte, 1919, vol. 52, p. 144
作者:Bodforss
DOI:——
日期:——
Polyaniline supported cobalt(II)-salen catalyst: One pot synthesis of β-phenylisoserine derivatives from cinnamoyl amide
作者:Bhaskar C. Das、Javed Iqbal
DOI:10.1016/s0040-4039(97)00499-1
日期:1997.4
A novel one pot conversion of cinnamoyl amides to the corresponding beta-phenylisoserine derivatives war developed by employing polyaniline supported cobalt(ll)-salen catalysed formation of the epoxide followed by its opening with anilines at ambient conditions. (C) 1997 Published by Elsevier Science Ltd.
Polyaniline supported cobalt(II) catalyst: Oxidation of alkenes with molecular oxygen
作者:Bhaskar C Das、Javed Iqbal
DOI:10.1016/s0040-4039(97)00045-2
日期:1997.2
Polyaniline supported Co(II) acetate catalyses the oxidation of different alkenes in the presence of 2-methylpropanal under the oxygen atmosphere at ambient temperature This catalyst can be tensed for epoxidations without any decline in its catalytic efficiency.