Trifluoromethoylation of arenes via intramolecular trifluoromethoxy group migration
申请人:Ngai Ming-Yu
公开号:US10676424B2
公开(公告)日:2020-06-09
The present invention provides a process of producing a trifluoromethoxylated aryl or trifluoromethoxylated heteroaryl having the structure:
wherein
A is an aryl or heteroaryl, each with or without substitution; and
R1 is —H, -(alkyl), -(alkenyl), -(alkynyl), -(aryl), -(heteroaryl), -(alkylaryl), -(alkylheteroaryl), —NH-(alkyl), —N(alkyl)2, —NH-(alkenyl), —NH-(alkynyl) —NH-(aryl), —NH-(heteroaryl), —O-(alkyl), —O-(alkenyl), —O-(alkynyl), —O-(aryl), —O-(heteroaryl); —S-(alkyl), —S-(alkenyl), —S-(alkynyl), —S-(aryl), or —S-(heteroaryl), comprising:
(a) reacting a compound having the structure:
with a trifluoromethylating agent in the presence of a base in a first suitable solvent under conditions to produce a compound having the structure:
and
(b) maintaining the compound produced in step (a) in a second suitable solvent under conditions sufficient to produce the trifluoromethoxylated aryl or trifluormethoxylated heteroaryl having the structure:
本发明提供了一种生产具有以下结构的三氟甲氧基化芳基或三氟甲氧基化杂芳基的工艺:
其中
A 是芳基或杂芳基,各自具有或不具有取代基;以及
R1 是-H、-(烷基)、-(烯基)、-(炔基)、-(芳基)、-(杂芳基)、-(烷芳基)、-(烷基杂芳基)、-NH-(烷基)、-N(烷基)2、-NH-(烯基)、-NH-(炔基)、-NH-(芳基)、-NH-(杂芳基)、-O-(烷基)、-O-(烯基)、-O-(炔基)、-O-(芳基)、-O-(杂芳基);-S-(烷基)、-S-(烯基)、-S-(炔基)、-S-(芳基)或-S-(杂芳基),包括:
(a) 使具有以下结构的化合物反应
在有碱存在的情况下,在第一种合适的溶剂中,用三氟甲基化合剂在一定条件下生成具有上述结构的化合物:
和
(b) 将步骤(a)中生成的化合物在第二种合适的溶剂中保持足够的条件,以生成具有 上述结构的三氟甲氧基化芳基或三氟甲氧基化杂芳基: