An efficient method for the synthesis of hydrocyclopenta[1,2-b]furan with various side chains at 3a-position
作者:Weihui Zhong、Jun Xie、Xian Peng、Tomoyuki Kawamura、Hisao Nemoto
DOI:10.1016/j.tetlet.2005.07.164
日期:2005.10
(3aS∗,1aR∗)-1a-Methoxy-3a-methoxycarbonyl-2,3,4,5,6,3a-hexahydrocyclopenta[1,2-b]furan was prepared in 96% overall yield from 2-methoxycarbonylated cyclopenta-1-one in two steps. This furan derivative is used as a divergent intermediate in the synthesis of our originally designed chiral resolving agents having various substitutions. During the preliminary evaluation of divergent synthetic products
(3 -a S ∗,1a R ∗)-1a-Methoxy-3a-methoxymethoxy-2,3,4,5,6,3a-hexahydrocyclopenta [1,2- b ]呋喃以2-甲氧基羰基化反应的总收率为96%制备两个步骤中的cyclopenta-1-one。该呋喃衍生物在我们最初设计的具有各种取代基的手性拆分剂的合成中用作发散中间体。在对各种合成产物进行初步评估时,发现3a-(芴-9-亚甲基)-2,3,4,5,3a-五氢环戊[1,2- b ]呋喃是一种显着改进的手性拆分剂。用于仲醇。