A Difluoromethylene Linchpin/Synthon: Application in Conjunction with Anion Relay Chemistry (ARC) Permits Ready Access to Diverse Difluoromethylene Scaffolds
作者:Kevin T. O’Brien、Jonathan W. Nadraws、Amos B. Smith
DOI:10.1021/acs.orglett.0c03508
日期:2021.3.5
difluoromethylene scaffolds. Initiated via [1,2]-addition of an organolithium reagent to a β-difluoromethylene silyl aldehyde, an alkoxide intermediate is formed, which is capable of undergoing a [1,4]-Brook rearrangement to generate a stabilized α-difluoromethylene carbanion, which, upon electrophile capture, affords a three-component adduct. This three component synthetic tactic represents a novel one-pot
有机二氟合成子与三组分非对映选择性阴离子中继化学 (ARC) 相结合,可以方便地使用各种二氟亚甲基支架。通过将有机锂试剂与 β-二氟亚甲基甲硅烷基醛 [1,2]-加成引发,形成醇盐中间体,该中间体能够进行 [1,4]-Brook 重排以产生稳定的 α-二氟亚甲基碳负离子,它在亲电捕获后提供三组分加合物。这种三组分合成策略代表了一种新的一锅发散策略,用于构建不同的有机二氟化合物。