thioesterification between thiols, 5‐bromo‐2‐furylcarbinols, and azides that provides rapid access to thioesters bearing a triazole moiety, highlighted by the cascade [3+2] cycloaddition/furan ring‐opening/thioesterification, is disclosed. Selenols are also suitable for this reaction. The new reaction features simple reaction conditions of AcCl/HFIP and a general substrate scope.
A novel and direct production of hydroxypyrones from furoic acid derivatives.
作者:Andrew Pelter、Robert S. Ward、D.Clive James、C. Kamakshi
DOI:10.1016/s0040-4039(00)88115-0
日期:1983.1
Alkaline bromine-methanol oxidation of 5-(α-hydroxybenzyl)furoic acids gives 6-aryl-5-hydroxy-2H-pyran-2-ones by a unique multistep oxidative decarboxylation-ring expansion sequence. Some studies into the reaction sequence are given.