The present invention provides novel methods for the asymmetric synthesis of (S)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1- benzoxazin-2-one of formula (VI-i) ##STR1## which is useful as a human immunodeficiency virus (HIV) reverse transcriptase inhibitor.
METHODS OF MAKING EFAVIRENZ AND INTERMEDIATES THEREOF
申请人:CHEN Bo
公开号:US20110015189A1
公开(公告)日:2011-01-20
The present invention provides a process for the preparation of Efavirenz. A compound of Formula 1 may be prepared by a process comprising cyclizing, in the presence of a first base, a compound of Formula 5 with a haloformate of Formula 6. Other processes are also provided as well as novel compounds prepared by and used in such processes.
The present invention relates generally to novel methods for the synthesis of cyclopropylacetylene which is a reagent in the asymmetric synthesis of (S)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-ben zoxazin-2-one which is a useful human immunodeficiency virus (HIV) reverse transcriptase inhibitor.
METHODS OF MAKING EFAVIRENS AND INTERMEDIATES THEREOF
申请人:CHEN Bo
公开号:US20120095249A1
公开(公告)日:2012-04-19
The present invention provides a process for the preparation of Efavirenz. A compound of Formula 1:
may be prepared by a process comprising cyclizing, in the presence of a first base, a compound of Formula 5 with a haloformate of Formula 6. Other processes are also provided as well as novel compounds prepared by and used in such processes.