[EN] METHOD FOR PREPARATION OF DIFLUOROMETHYLORNITHINE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE DIFLUOROMÉTHYLORNITHINE
申请人:LONZA AG
公开号:WO2019057951A1
公开(公告)日:2019-03-28
The invention discloses a method for preparation of protected difluoromethylornithine by a difluoromethylation of dibenzaldimine ornithine ester using CHF3 and LiHMDS (lithium bis(trimethylsilyl)amide), which can be converted to a salt of unprotected difluoromethylornithine by a subsequent deprotection under acidic conditions in the presence of water.
A novel reaction cascade leading to a spontaneous intramolecular dipolar cycloaddition through simultaneous generation of 1,3-dipole and dipolarophile
作者:Nagabushanam Kalyanam、Keshav R Rapole、Ramanujam Rajendran、Muhammed Majeed
DOI:10.1016/j.tetlet.2013.07.009
日期:2013.9
Ornithine methyl ester reacts with aromatic aldehydes to generate bis-Schiff bases, which depending on the structure of the aromatic aldehyde, further undergo an intramolecular cycloaddition through the transient formation of a reactive 1,3-dipole.