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
描述了萘基-异喹啉生物碱(-)- O-甲基-tantantrotrod的非对称全合成;39。该合成方法还提供了到达阻转异构体(+)- O-甲基ham丁啶43和这些生物碱的对映异构体的途径。联芳基键的不对称结构涉及衍生自2-(2-溴-3,5-二甲氧基苯基)-1,3-二恶烷7的格利雅试剂与(+)-(4 S,5 S)-4的反应-(甲氧基甲基)-5-苯基-2-(1,4,5-三甲氧基-2-萘基)-4,5-二氢恶唑5。