-
公开(公告)号:US20020013480A1
公开(公告)日:2002-01-31
申请号:US09918674
申请日:2001-07-31
发明人: Ze-Qi Xu , Hongwei Yuan , Jennifer Crabb , Raghu Samy , Ailing Li , Hua Cao
IPC分类号: C07D493/02
CPC分类号: C07D493/04 , C07D493/14
摘要: The present invention relates to methods for preparing 2,2-dimethyl-5-acyloxy-10-propyl-2H,8H-benzonull 1,2-b:3,4-b nullnulldipyran-8-one (5) and 2,2-dimethyl-5-hydroxy- 10-propyl-2H,8H-benzonull1,2-b:3,4-b nullnulldipyran-8-one (6) and their use as intermediates for the synthesis of antiviral calanolide compounds. For example, Fries rearrangement on compound 5 or Friedel-Crafts reaction on 6, yields intermediate 2,2-dimethyl-5-hydroxy-6-propionyl-10-propyl-2H,8H-benzonull1,2-b:3,4-bnullnulldipyran-8-one (4), which, in turn, can be converted to (null)-calanolide A and (null)-calanolide B. The coupling of compound 6 with the appropriate chiral molecule under Mitsunobu or nucleophilic displacement leads to the asymmetric synthesis of antiviral calanolide compounds.
摘要翻译: 本发明涉及制备2,2-二甲基-5-酰氧基-10-丙基-2H,8H-苯并[1,2-b:3,4-b']二吡喃-8-酮(5)的方法和 2,2-二甲基-5-羟基-10-丙基-2H,8H-苯并[1,2-b:3,4-b']二吡喃-8-酮(6)及其作为合成中间体的用途 抗病毒胼cal体化合物。 例如,化合物5上的Fries重排或6上的Friedel-Crafts反应产生中间体2,2-二甲基-5-羟基-6-丙酰基-10-丙基-2H,8H-苯并[1,2-b:3, 4-b']二吡喃-8-酮(4),其反过来可以转化为(+) - 卡立拉内酯A和( - ) - 甘露糖苷B.在Mitsunobu或化合物6与化合物6与适当的手性分子的偶联 亲核取代导致抗病毒胼cal体化合物的不对称合成。