Total synthesis of kealiiquinone: the regio-controlled strategy for accessing its 1-methyl-4-arylbenzimidazolone core
作者:Velayudham Ramadoss、Angel J. Alonso-Castro、Nimsi Campos-Xolalpa、Rafael Ortiz-Alvarado、Berenice Yahuaca-Juárez、César R. Solorio-Alvarado
DOI:10.1039/c8ra06676k
日期:——
A practical, concise and straightforward total synthesis of kealiiquinone 1, a naphtho[2,3-d]imidazole alkaloid obtained from the Micronesian marine sponge Leucetta sp. was accomplished. The squaric acid chemistry to construct the 1,4-quinoid ring and the regioselective N-methylation through a benzo[c][1,2,5]selenadiazolium heterocycle are the key features in this report. The full details of the representative
kealiiquinone 1的实用、简洁和直接的全合成方法,一种从密克罗尼西亚海海绵Leucetta sp.获得的萘并[2,3- d ] 咪唑生物碱。完成了。构建1,4-醌环的方酸化学和通过苯并[ c ][1,2,5]硒二唑杂环进行区域选择性N-甲基化是本报告的关键特征。还介绍了涉及不同尝试合成策略的代表性方法的全部细节。最后描述了这种复杂次级代谢物的成功全合成。