摘要:
An efficient method for the preparation of a compound of (-)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl- 1,4-dihydro-2H-3, 1-benzoxazin-2-one, also known as DMP-266, a reverse transcriptase inhibitor is achieved using a cyclization reaction of the amino alcohol intermediate with an alkyl or aryl chloroformate and a base.
摘要:
An efficient method for the preparation of a compound of (-)-6-chloro-4-cyclopropylethynyl-4-trifluoromethyl-1,4-dihydro-2H-3,1-benzoxazin-2-one, also known as DMP-266, a reverse transcriptase inhibitor is achieved using a cyclization reaction of the amino alcohol intermediate with an alkyl or aryl chloroformate and a base.
摘要:
The invention encompasses a process for making compounds of Formula I useful in the treatment of inflammation and other cyclooxygenase-2 mediated diseases.
摘要:
A simple, high yielding synthesis of a-chloro ketones is described, involving acylation of Grignard and organolithium reagents with N-methoxy-N-methylchloroacetamide. The efficiency of the process is further enhanced by recycling N,O-dimethylhydroxylamine.
摘要:
This invention relates to a key intermediate in the synthesis of an endothelin antagonist and the synthesis of this key intermediate using an asymmetric conjugate addition reaction.
摘要:
This invention relates to a key intermediate in the synthesis of an endothelin antagonist, the synthesis of this key intermediate and the synthesis of an endothelin antagonist using this intermediate in a stereoselective deoxygenation reaction.
摘要:
This invention relates to a key intermediate in the synthesis of an endothelin antagonist and the synthesis of this key intermediate using an asymmetric conjugate addition reaction.
摘要:
The present invention is directed to Compounds of Formula (I) and salts thereof, wherein R1, R2, R3 and R4 are defined above herein. The present invention is also directed to uses of the compounds of Formula (I) to add phosphoramidate groups onto organic alcohols.
摘要:
The present invention is directed to a practical process for the preparation of an enamide (II) by palladium catalyzed coupling of a primary amide (IV) with a compound of structural formula (III), as shown below: As well as to crystalline forms of a compound produced by this process, in particular, an anhydrous crystal form, Form B, and crystalline solvates falling into three patterns, Type 1, Type 2, and Type 3, and crystalline intermediate compounds produced in the process. Still further, the present invention relates to the stereoselective reduction of the tetrasubstituted enamide (II) to the corresponding amide (I).