Chiral Bicyclic Guanidine-Catalyzed Enantioselective Reactions of Anthrones
作者:Juan Shen、Thanh Truc Nguyen、Yong-Peng Goh、Weiping Ye、Xiao Fu、Junye Xu、Choon-Hong Tan
DOI:10.1021/ja064636n
日期:2006.10.1
catalyst for reactions between anthrones and various dienophiles. The catalyst can tolerate a range of substituents and substitution patterns, making several anthrone derivatives suitable for this reaction. Both Diels-Alder and Michael adducts were obtained in excellent yields, high regioselectivities, and high enantioselectivities. This is the first case of a highly enantioselective base-catalyzed anthrone
手性双环胍 1 被发现是蒽酮和各种亲二烯体之间反应的极好催化剂。该催化剂可以耐受一系列取代基和取代模式,使几种蒽酮衍生物适用于该反应。Diels-Alder 和 Michael 加合物均以优异的产率、高区域选择性和高对映选择性获得。这是高度对映选择性碱催化蒽酮 Diels-Alder 反应的第一个案例。
REPELLENT AGAINST AQUATIC ORGANISMS
申请人:IHARA CHEMICAL INDUSTRY Co., Ltd.
公开号:EP0010107A1
公开(公告)日:1980-04-30
A repellent against aquatic organisms, characterized by comprising as effective ingredients at least one compound of N-arylmaleimide represented by the general formula:
Wherein: X, and X2 are the same or different, and denote hydrogen and halogen atoms, respectively; Y is a halogen atom, alkyl group or lower alkoxy group; and n is 0 or an interger from 1 to 3; and at least one compound selected from a group of organotin compounds comprising bis (tri-n-butyl tin) mesodibromosuccinate, tripenyl tin monochloroacetate, triphenyl tin hydroxide and bis (tri-n-butyl tin) oxide.