Practical and High-Yield Syntheses of Dihydromorphine from Tetrahydrothebaine and Efficient Syntheses of (8S)-8-Bromomorphide
摘要:
A practical method for the conversion of tetrahydrothebaine to dihydromorphine in 92% yield is described. The procedure should allow more efficient production of opium products and may be easily modified for large-scale synthesis. The conversion of codeine to (8S)-8-bromomorphide, a potentially valuable intermediate to 6-demethoxyoripavine and derivatives, is also described. The absolute configuration of (8S)-8-bromomorphide was determined by a single-crystal X-ray diffraction study of the hydrobromide salt.