Patent ID: 6420571
Filing Date: 2002-07-16
Classification: A61P,C07D

Abstract:
A method for preparing a compound having a structure: said method comprising the steps of:(a) coupling 2,2-dimethyl-5-hydroxy-10-propyl-2H,8H-benzo[1,2-b:3,4-b â€²]dipyran-8-one with compound 12 wherein Z represents TBDMS, THP or Ts to produce compound 14: wherein Z is the same as described above;(b) deprotecting compound 14 to produce compound 14 (Z=H); (c) oxidizing compound 14 (Z=H) to produce compound 13 (Y=H); and (d) oxidizing compound 13 (Y=H) to produce compound 13 (Y=OH).