Diastereoselective synthesis of spirooxindole derivatives via biocatalytic domino reaction
摘要:
A facile promiscuous reaction catalyzed by Acylase 'Amano' was developed for the preparation of spirooxindole derivatives. At the optimized reaction condition, the acylase-catalyzed domino reactions could provide a series of different spirooxindole products in moderate yields and good diastereoselectivity. A chemo-enzymatic two-step process was also designed successfully, and several representative spirooxindole derivatives could be obtained in nearly quantitative yields. Additionally, one tentative mechanism for this enzyme-catalyzed process was proposed. (C) 2014 Elsevier Ltd. All rights reserved.
Synthesis of 2-cyanoacrylamides through Pd-catalyzed monohydration of methylenemalononitriles
摘要:
A straightforward and efficient method has been developed for the synthesis of 2-cyanoacrylamide from 2-methylenemalononitriles through monohydration. A series of methylenemalononitriles underwent the reaction under mild and simple reaction conditions with good to excellent yield.[GRAPHICS].
and 5-nitro derivatives underwent smooth reaction with a variety of acyclic and cyclic active methylene compounds on neutral alumina at rt to efficiently furnish Knoevenagel condensates in the majority of the cases and tandem Knoevenagel condensation-Michael addition products including spiro compounds in two cases.
Synthesis of 2-cyanoacrylamides through Pd-catalyzed monohydration of methylenemalononitriles
作者:Yingtian Liu、Xinxin Dang、Yu He、Hudong Bai、Xuehong Chen、Jun-Long Li、Junting Fan、Hezhong Jiang、Jiahong Li
DOI:10.1080/00397911.2018.1542496
日期:2019.3.4
A straightforward and efficient method has been developed for the synthesis of 2-cyanoacrylamide from 2-methylenemalononitriles through monohydration. A series of methylenemalononitriles underwent the reaction under mild and simple reaction conditions with good to excellent yield.[GRAPHICS].
Diastereoselective synthesis of spirooxindole derivatives via biocatalytic domino reaction
作者:Yi-Ru Liang、Xiao-Yang Chen、Qi Wu、Xian-Fu Lin
DOI:10.1016/j.tet.2014.12.027
日期:2015.1
A facile promiscuous reaction catalyzed by Acylase 'Amano' was developed for the preparation of spirooxindole derivatives. At the optimized reaction condition, the acylase-catalyzed domino reactions could provide a series of different spirooxindole products in moderate yields and good diastereoselectivity. A chemo-enzymatic two-step process was also designed successfully, and several representative spirooxindole derivatives could be obtained in nearly quantitative yields. Additionally, one tentative mechanism for this enzyme-catalyzed process was proposed. (C) 2014 Elsevier Ltd. All rights reserved.