Imidazolidinone based chiral auxiliary mediated acetate aldol reactions of isatin derivatives and stereoselective synthesis of 3-substituted-3-hydroxy-2-oxindoles
作者:Mukesh Gangar、Naresh Kashyap、Kapil Kumar、Sandeep Goyal、Vipin A. Nair
DOI:10.1016/j.tetlet.2015.11.007
日期:2015.12
Acetate aldol reactions of (S)-4-isopropyl-1-[(R)-1-phenylethyl]imidazolidin-2-one chiral auxiliary have been optimized with high yields and diastereoselectivity on various N-substituted isatins. The standardized reaction condition was employed for the stereoselective synthesis of furoindolines, and the pyrroloindole based natural products flustraminol B and N-benzyl alline.
(S)-4-异丙基-1-[((R)-1-苯基乙基]咪唑啉烷-2-酮手性助剂的乙酸醛醇缩合反应已被优化,对各种N-取代的靛红具有高产率和非对映选择性。标准化反应条件用于呋喃二氢吲哚和基于吡咯并吲哚的天然产物氟雌醇B和N-苄基烯丙基的立体选择性合成。