发明名称 |
METHODS FOR PREPARING ANTIVIRAL CALANOLIDE COMPOUNDS |
摘要 |
The present invention relates to methods for preparing 2,2-dimethyl-5-acyloxy-10-propyl-2H,8H-benzo[1,2-b:3,4-b']dipyran-8-one (5) and 2,2-dimethyl-5-hydroxy-10-propyl-2H,8H-benzo[1,2-b:3,4-b']dipyran-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-benzo[1,2-b:3,4-b']dipyran-8-one (4), which, in turn, can be converted to (+)-calanolide A and (-)-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. |
申请公布号 |
WO0064903(A2) |
申请公布日期 |
2000.11.02 |
申请号 |
WO2000US11151 |
申请日期 |
2000.04.25 |
申请人 |
SARAWAK MEDICHEM PHARMACEUTICALS, INC.;XU, ZE-QI;YUAN, HONGWEI;CRABB, JENNIFER;SAMY, RAGHU;LI, AILING;CAO, HUA |
发明人 |
XU, ZE-QI;YUAN, HONGWEI;CRABB, JENNIFER;SAMY, RAGHU;LI, AILING;CAO, HUA |
分类号 |
A61P31/12;C07D493/04;C07D493/14 |
主分类号 |
A61P31/12 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|