Efficient synthesis of optically active 4-nitro-cyclohexanones via bifunctional thiourea-base catalyzed double-Michael addition of nitromethane to dienones
作者:Bin Wu、Guo-Gui Liu、Mei-Qiu Li、Yong Zhang、Shao-Yun Zhang、Jun-Ru Qiu、Xiao-Ping Xu、Shun-Jun Ji、Xing-Wang Wang
DOI:10.1039/c0cc05418f
日期:——
Thiourea-modified cinchona alkaloids as bifunctional catalysts and a base could catalyze a stepwise [5+1] cyclization of divinyl ketones with nitromethane via double Michael additions, furnishing optically active 4-nitro-cyclohexanones with good yields, excellent diastereoselectivities (>20 : 1) and high enantiomeric ratios (up to 97 : 3).
METHODS TO PREPARE PENTA-1,4-DIEN-3-ONES AND SUBSTITUTED CYCLOHEXANONES AND DERIVATIVES WITH ANTITUMORAL AND ANTIPARASITIC PROPERTIES, THE COMPOUNDS AND THEIR USES
申请人:Suarez Jose Agustin Quincoces
公开号:US20100029763A1
公开(公告)日:2010-02-04
The present invention refers to new derivatives of the penta-1,4-dien-3-ones, as well as their processes of preparation. These compounds present strong antitumoral activity and promising antiparasitic action, behaving as almost atoxic by laboratory assays and also by hystopathologic studies. The present invention refers also to a pharmaceutical composition including the referred compounds, method of treatment for cancer and parasitic diseases.