Organocatalyzed Michael–Henry reactions: enantioselective synthesis of cyclopentanecarbaldehydes via the dienamine organocatalysis of a succinaldehyde surrogate
Asymmetric Formal [3+2] Cycloaddition Reaction of Succinaldehyde and Nitroalkene Catalyzed by Diphenylprolinol Silyl Ether
作者:Shigenobu Umemiya、Yujiro Hayashi
DOI:10.1002/ejoc.201500623
日期:2015.7
The enantioselective domino Michael/Henry reaction of nitroalkenes with succinaldehyde was found to proceed efficiently upon using diphenylprolinolsilylether as the organocatalyst. The reaction affords cis-disubstituted nitropentenes with excellent diastereoselectivities and enantioselectivities after treatment of the Michael product with Ac2O and pyridine.
发现硝基烯烃与琥珀醛的对映选择性多米诺迈克尔/亨利反应在使用二苯基脯氨醇甲硅烷基醚作为有机催化剂时有效地进行。在用 Ac 2 O 和吡啶处理迈克尔产物后,该反应提供具有优异非对映选择性和对映选择性的顺式二取代硝基戊烯。
Organocatalyzed Michael–Henry reactions: enantioselective synthesis of cyclopentanecarbaldehydes via the dienamine organocatalysis of a succinaldehyde surrogate
Asymmetric formal [3+2] cycloadditions of 4-hydroxybut-2-enal, a succinaldehyde surrogate, and nitroalkenes with an organocatalyst provided cyclopentanecarbaldehydes containing four consecutive stereogenic centers with excellent enantioselectivities.