The present invention provides methods for the conversion of thebaine to a morphine derivative, such as hydrocodone. Novel ketal intermediates of the conversion are provided. A one-pot procedure for the conversion comprises treating thebaine with an acid in the presence of a metal catalyst.
One-Pot Conversion of Thebaine to Hydrocodone and Synthesis of Neopinone Ketal
作者:Robert J. Carroll、Hannes Leisch、Lena Rochon、Tomas Hudlicky、D. Phillip Cox
DOI:10.1021/jo802454v
日期:2009.1.16
The ethylene glycol ketal of neopinone was prepared in a one-pot procedure by the reaction of thebaine with ethylene glyocol in the presence of p-toluenesulfonic acid. The ketal is also an intermediate in the conversion of thebaine to hydrocodone with ethylene glycol and Pd(OAc)2, followed by hydrogenation. Additionally, a one-pot procedure for the conversion of thebaine to hydrocodone was achieved