Direct Synthesis of Benzo[<i>b</i>]fluorenyl Thiophosphates via Tandem Cyclization of Diynols with (RO)<sub>2</sub>P(O)SH
作者:Sha Du、Shimin Jiang、Ruchun Yang、Fengyan Jin、Haiyang Huang、Wan-Fa Tian、Zhao-Zhao Zhou、Xian-Rong Song、Qiang Xiao
DOI:10.1021/acs.orglett.3c00009
日期:2023.3.3
A general and metal-free protocol for the construction of benzo[b]fluorenyl thiophosphates was developed through the cascade cyclization of easily prepared diynols and (RO)2P(O)SH, with water as the only byproduct. The novel transformation involved the allenyl thiophosphate as the key intermediate, followed by Schmittel-type cyclization to achieve the desired products. Notably, (RO)2P(O)SH acted not
通过简单制备的二炔醇和 (RO) 2 P(O)SH 的级联环化,开发了一种用于构建苯并 [ b ] 芴基硫代磷酸酯的通用且无金属方案,水是唯一的副产物。新的转化以丙二烯硫代磷酸酯为关键中间体,然后进行施密特型环化以获得所需的产物。值得注意的是,(RO) 2 P(O)SH 不仅作为亲核试剂,而且作为启动反应的酸促进剂。