Stereoselective synthesis of (3S,4R)- and (3R,4S)-4-(N-substituted-amino)-2,2-dimethyl-6-nitrochroman-3-ols via the microwave assisted regioselective ring opening of epoxides in the presence of neutral alumina
作者:Li-juan Meng、B.V.D. Vijaykumar、Hua Zuo、Zhu-Bo Li、Gautam Dupati、Kiwan Jang、Dong-Soo Shin
DOI:10.1016/j.tetasy.2012.07.002
日期:2012.7
With the aim of discovering new molecules with potassium channel activating properties, we have designed and synthesized derivatives with structural similarity to cromakalim, an important molecule which shows specific affinity toward potassium channels, based on previous structure-activity investigations by applying different C-4 substitutions. This has been accomplished by using a stereoselective Jac. obsen epoxidation and microwave assisted regioselective epoxide opening with neutral alumina as the key reactions. (c) 2012 Elsevier Ltd. All rights reserved.