An Expeditious Asymmetric Synthesis of Polyfunctional 1,7-Dioxaspiro[5.5]undecanes
作者:Sandrine Gerber-Lemaire、Pierre Vogel
DOI:10.1002/ejoc.200400514
日期:2004.12
Quick access to polyfunctional spiroketal (3R)-4-[(2S,6R,8R, 10S)-4,4-bis(ethylthio)-10-hydroxy-8-(2-hydroxyethyl)- 1,7-dioxaspiro[5.5]undec-2-yl]butane- 1,3-diol [(+)-19] is now available through the stereoselective functionalization of enantiomerically pure protected tetrol (4R,4'R,6R,6'R)- 1, l'-methylenebis[4-[(benzyloxy)methoxy]-6-[(triethylsilyl)-oxy]cyclohept- 1-ene [(-)-9], derived from 2,2'-methylenedifuran
快速获取多功能螺缩酮 (3R)-4-[(2S,6R,8R, 10S)-4,4-bis(ethylthio)-10-hydroxy-8-(2-hydroxyethyl)-1,7-dioxaspiro[5.5 ]undec-2-yl]butane-1,3-diol [(+)-19] 现在可以通过对映体纯保护四醇 (4R,4'R,6R,6'R)- 1, l 的立体选择性功能化获得'-亚甲基双[4-[(苄氧基)甲氧基]-6-[(三乙基甲硅烷基)-氧基]环庚-1-烯[(-)-9],衍生自2,2'-亚甲基二呋喃。(C) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)。