Arylboronic Acid Catalyzed C-Alkylation and Allylation Reactions Using Benzylic Alcohols
摘要:
The arylboronic acid catalyzed dehydrative C-alkylation of 1,3-diketones and 1,3-ketoesters using secondary benzylic alcohols as the electrophile is reported, forming new C-C bonds (19 examples, up to 98% yield) with the release of water as the only byproduct. The process is also applicable to the allylation of benzylic alcohols using allyltrimethylsilane as the nucleophile (12 examples, up to 96% yield).
作者:Noelke, Margot、Verevkin, Sergej P.、Beckhaus, Hans-Dieter、Ruechardt, Christoph
DOI:——
日期:——
Arylboronic Acid Catalyzed <i>C</i>-Alkylation and Allylation Reactions Using Benzylic Alcohols
作者:Susana Estopiñá-Durán、Euan B. Mclean、Liam J. Donnelly、Bryony M. Hockin、James E. Taylor
DOI:10.1021/acs.orglett.0c02736
日期:2020.10.2
The arylboronic acid catalyzed dehydrative C-alkylation of 1,3-diketones and 1,3-ketoesters using secondary benzylic alcohols as the electrophile is reported, forming new C-C bonds (19 examples, up to 98% yield) with the release of water as the only byproduct. The process is also applicable to the allylation of benzylic alcohols using allyltrimethylsilane as the nucleophile (12 examples, up to 96% yield).
Chiral Phosphoric Acid Catalyzed Desymmetrization of Cyclopentendiones via Friedel–Crafts Conjugate Addition of Indolizines
作者:Qijian Ni、Zhiming Zhu、Yanjun Fan、Xiaoyun Chen、Xiaoxiao Song
DOI:10.1021/acs.orglett.1c03780
日期:2021.12.17
An organocatalytic highly diastero- and enantioselective Friedel–Crafts conjugate addition of indolizines to prochiral cyclopentenediones has been successfully developed. This desymmetric transformation provides a direct access to the desired indolizine-substituted cyclopentanediones in yields of 62–91% and excellent stereoselectivities. The utility of the approach was demonstrated by diverse late-stage