Facile and Short-Step Synthesis of 5-Substituted 2,3,4,5-Tetrahydrobenz[f][1,4]Oxazepines Using a Modified Pictet-spengler Reaction
摘要:
5-Substituted 2,3,4,5-tetrahydrobenzo [1,4] oxazepines (6) were synthesized using a modified Pictet-Spengler reaction of formyliminium ion (4) as the key step. Cyclization of 4 proceeded readily by using trifluoroacetic acid as a catalyst, giving 5 -substituted N-formyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepines (5) in 26-78% yield. The imination of 2-phenoxyethanamine (1) with aldehydes, formylation of the resulting imines (3), and the acid-catalyzed cyclization steps could be carried out in a one-pot procedure. Hydrolysis of 5 with hydrochloric acid gave the 5-substituted 2,3,4,5-tetrahydrobenzo[f][1,4]oxazepines (6) in high yields.
申请人:GlaxoSmithKline Intellectual Property Development Limited
公开号:US10364256B2
公开(公告)日:2019-07-30
The present invention relates to biaryl pyrazole compounds of Formula (I)
methods of making them, pharmaceutical compositions containing them and their use as NRF2 regulators.
申请人:GlaxoSmithKline Intellectual Property Development Limited
公开号:US20180282349A1
公开(公告)日:2018-10-04
The present invention relates to biaryl pyrazole compounds of Formula (I)
methods of making them, pharmaceutical compositions containing them and their use as NRF2 regulators.