An Effective Bifunctional Aldehyde Linchpin for Type II Anion Relay Chemistry: Development and Application to the Synthesis of a C16–C29 Fragment of Rhizopodin
作者:Bruno Melillo、Ming Z. Chen、Roberto Forestieri、Amos B. Smith
DOI:10.1021/acs.orglett.5b03235
日期:2015.12.18
The design, synthesis, and validation of a new bifunctional aldehyde linchpin for Type II anion relay chemistry have been achieved. For this linchpin, the initial nucleophilic addition proceeds under Felkin–Anh control to generate the syn-alkoxide, which undergoes a 1,4-Brook rearrangement to relay the negative charge, thus leading to the formation of a dithiane-stabilized carbanion. Subsequent trapping
已经设计,合成和验证了用于II型阴离子继电化学的新型双功能醛键。对于这一关键的化合物,最初的亲核加成反应在Felkin-Anh的控制下进行,生成顺式醇盐,然后进行1,4-Brook重排以传递负电荷,从而导致双硫烷稳定的碳负离子的形成。随后用亲电试剂捕获,使三组分加合物具有嵌入的丙酸酯亚基,丙酸酯亚基是在聚酮化合物中普遍存在的结构基序。通过构建潜在的C16–C29片段来合成这种新的linchpin的实用性,该片段可用于合成支配肌动蛋白的大环内酯类根瘤菌素。