1616472-40-2Relevant academic research and scientific papers
PROCESS FOR PREPARING 7β-SUBSTITUTED 6α,14α -ETHENOMORPHINANS AND 7β-SUBSTITUTED 6α,14α-ETHANOMORPHINANS
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, (2014/07/21)
The application is directed to a process for increasing the proportion of 7β-epimer in an 7α/7β-epimer mixture of a 7-substituted 6α,14α-ethenomorphinan or a 7-substituted 6α,14α-ethanomorphinan, and specifically of compounds of Formula (I), wherein G, R2-R4, and are defined as set forth in the specification. The application is also directed to a process for purifying the 7β-epimer from an 7α/7β-epimer mixture of a 7-substituted 6α,14α-ethenomorphinan or a 7-substituted 6α, 14α-ethanomorphinan. The application is also directed to a process for preparing 7β-substituted compounds of Formula Vb wherein G and R2 -R5 are defined as set forth in the specification.
