Ring-D aromatic phytosteroids; a model for biogenesis by way of carbon radical rearrangement
作者:Stuart P. Green、Donald A. Whiting
DOI:10.1039/p19960001027
日期:——
A mechanism is postulated for the biogenesis of the unique ring-D aromatic phytosteroids from Nicandra physaloides, which involves rearrangement, ring expansion, and aromatisation of a carbon radical generated by cytochrome P450 (Scheme 1). In support, model hydrindene acids 15b and 18b have been synthesized and subjected to homolytic decarboxylation; the latter acid yielded 6-methyltetralin 24, in
推测了一种机制,是尼古拉二十倍体中独特的D环芳族植物甾体的生物发生,该过程涉及细胞色素P450产生的碳自由基的重排,环扩展和芳构化(方案1)。在载体上,合成了模型氢化苯甲酸15b和18b并进行了均相脱羧作用。后者的酸以仿生的方式产生了6-甲基四氢化萘24。该异构酸不仅提供6-甲基四氢化萘24,而且还提供5-甲基四氢化萘26;和 讨论了这种异常重新排列的机制。