| 摘要 |
The present invention relates to an improved process for producing naltrexone [17- (cyclopropylmethyl)-4,5a-epoxy-3,14-dihydroxy-morphinan-6-one] from noroxymorphone [4,5- a-epoxy-3,14-dihydroxy-morphinan-6-one] by alkylation with a cyclopropylmethyl halide.
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