Acetoxy Meldrum’s Acid: A Versatile Acyl Anion Equivalent in the Pd-Catalyzed Asymmetric Allylic Alkylation
作者:Barry M. Trost、Maksim Osipov、Philip S. J. Kaib、Mark T. Sorum
DOI:10.1021/ol2011242
日期:2011.6.17
Acetoxy Meldrum’s acid can serve as a versatile acylanionequivalent in the Pd-catalyzed asymmetric allylic alkylation. The reaction of this nucleophile with various meso and racemic electrophiles afforded alkylated products in high yields and enantiopurities. These enantioenriched products are versatile intermediates that can be further functionalized using nitrogen- and oxygen-centered nucleophiles
Acetoxy Meldrum 的酸可以在 Pd 催化的不对称烯丙基烷基化中用作通用的酰基阴离子等价物。该亲核试剂与各种内消旋和外消旋亲电试剂的反应以高产率和对映纯度提供烷基化产物。这些对映体富集的产品是多功能中间体,可以使用以氮和氧为中心的亲核试剂进一步功能化,为合成核苷类似物提供多功能支架。这些支架用于完成抗 HIV 药物卡波韦、阿巴卡韦和抗生素阿里斯特霉素的正式合成。
Palladium-Catalyzed Asymmetric Allylic Alkylation of Electron-Deficient Pyrroles with <i>Meso</i> Electrophiles
作者:Barry M. Trost、Maksim Osipov、Guangbin Dong
DOI:10.1021/ol3006584
日期:2012.5.4
Pyrroles can serve as competent nucleophiles with meso electrophiles in the Pd-catalyzed asymmetric allylic alkylation. The products from this transformation were obtained as a single regio- and diastereomer in high yield and enantiopurity. A nitropyrrole-containing nucleoside analogue was synthesized in seven steps to demonstrate the synthetic utility of this transformation.
SUBSTITUTED CARBONUCLEOSIDE DERIVATIVES USEFUL AS ANTICANCER AGENTS
申请人:Pfizer Inc.
公开号:US20170348313A1
公开(公告)日:2017-12-07
Compounds of the general formula):
processes for the preparation of these compounds, compositions containing these compounds, and the uses of these compounds.