Highly Enantioselective Michael Addition of Ketone to Alkylidene Malonates Catalyzed by Binaphthyl Sulfonimides in Water
作者:Shengjian Jia、Chunhua Luo、Daming Du
DOI:10.1002/cjoc.201200910
日期:2012.11
Binaphthyl sulfonimides have been developed to catalyze the asymmetric Michaeladdition of ketone to alkylidene malonates, affording the corresponding Michael products in good to high yields (up to 98%) with good to excellent diastereoselectivity (up to 99:1 dr) and enantioselectivity (up to 92% ee) under mild conditions using environmentally benign water as the solvent.
Enantioselective Organocatalytic Michael Addition of Ketones to Alkylidene Malonates
作者:Siang-En Syu、Chan-Hui Huang、Ko-Wei Chen、Chia-Jui Lee、Utpal Das、Yeong-Jiunn Jang、Wenwei Lin
DOI:10.1002/chir.22055
日期:2012.8
studied for the direct asymmetric Michaeladdition of ketones and alkylidenemalonates. The organocatalyst (S)‐2‐((naphthalen‐2‐ylthio)methyl)pyrrolidine, bearing a pyrrolidine and a sulfide moiety, showed a very high catalytic activity in the absence of additives. The reaction condition is mild, and the Michael adducts were obtained in very good enantioselectivities (up to 96%), diastereoselectivities
Highly Enantioselective Conjugate Addition of Ketones to Alkylidene Malonates Catalyzed by a Pyrrolidinyl-Camphor-Derived Organocatalyst
作者:Dhananjay R. Magar、Chihliang Chang、Ying-Fang Ting、Kwunmin Chen
DOI:10.1002/ejoc.201000072
日期:2010.4
Pyrrolidinyl-camphor derivatives have been proven to be efficient organocatalysts for enantioselective conjugate addition of ketones to alkylidenemalonates, affording high chemical yields (up to 95 %) of the corresponding products with high to excellent levels of diastereoselectivity (up to >99:1 dr) and enantioselectivity (up to 96 % ee) under solvent-free reaction conditions at ambient temperature.
吡咯烷基-樟脑衍生物已被证明是酮与亚烷基丙二酸酯的对映选择性共轭加成的有效有机催化剂,可提供高化学产率(高达 95%)的相应产物,并具有高至极好的非对映选择性(高达 >99:1 dr ) 和对映选择性(高达 96% ee),在无溶剂反应条件下,室温。
Blarer, Stefan J.; Seebach, Dieter, Chemische Berichte, 1983, vol. 116, # 6, p. 2250 - 2260
作者:Blarer, Stefan J.、Seebach, Dieter
DOI:——
日期:——
BLARER, S. J.;SEEBACH, D., CHEM. BER., 1983, 116, N 6, 2250-2260