作者:Berlin, Cameron B.、Roenfanz, Hanna F.、Salwen, Madeleine、Nehete, Sai、Kozlowski, Marisa C.
DOI:10.1021/acs.orglett.4c01352
日期:——
The first total syntheses of glycoborinine, clausenawalline A, and clausenawalline E were achieved. The key step employed a vanadium-catalyzed oxidative coupling of two hydroxycarbazole monomers. High-throughput experimentation was used to identify conditions favoring selective heterocoupling of these monomers that possess similar redox potentials. A combination of a vanadium catalyst and 4-acetamido-TEMPO
首次实现了糖硼蛋白、黄皮蛋白 A 和黄皮蛋白 E 的全合成。关键步骤采用钒催化的两个羟基咔唑单体的氧化偶联。高通量实验用于确定有利于这些具有相似氧化还原电位的单体选择性杂偶联的条件。相对于单独的钒催化剂,钒催化剂和4-乙酰氨基-TEMPO的组合大大提高了交叉选择性。发现了选择性形成同二聚体黄皮蛋白A或异二聚体黄皮蛋白E作为主要产物的条件。