Synthetic approaches to the naphthyl-isoquinoline alkaloids. Part 2. The total synthesis of (–)-O-methylancistrocladine and (+)-O-methylhamatine and their enantiomers
作者:Mark A. Rizzacasa、Melvyn V. Sargent
DOI:10.1039/p19910000845
日期:——
of the naphthyl-isoquinoline alkaloids (–)-O-methytancistrocladine 39 is described; the synthetic method also provides routes to the atropisomer (+)-O-methylhamatine 43 and the enantiomers of these alkaloids. The asymmetric construction of the biaryl linkage involved the reaction of the Grignard reagent derived from 2-(2-bromo-3,5-dimethoxyphenyl)-1,3-dioxane 7 with (+)-(4S,5S)-4-(methoxymethyl)-5-phenyl-2-(1