Copper-Catalyzed Regio- and Diastereoselective Additions of Boron-Stabilized Carbanions to Heteroarenium Salts: Synthesis of Azaheterocycles Containing Contiguous Stereocenters
作者:Rajender Nallagonda、Rashad R. Karimov
DOI:10.1021/acscatal.0c04474
日期:2021.1.1
Nucleophilic addition of diborylalkyl reagents to N-alkyl or N-acylpyridinium and related heteroarenium salts has been developed as a key step for the synthesis of nonaromatic nitrogen heterocycles that contain contiguous stereogenic centers. Derivatization of the dihydropyridine products for the synthesis of tetrahydropyridines and piperidines have also been described.
The regio- and stereoselectivesynthesis of allylsilane derivatives bearing a tetrasubstituted olefin was achieved using 2,2-diborylethylsilane as a key intermediate. The regioselective deprotonati...
A General Method to Access Sterically Encumbered Geminal Bis(boronates) via Formal Umpolung Transformation of Terminal Diboron Compounds
作者:Peng‐Fei Ning、Yi Wei、Xin‐Yi Chen、Yi‐Fei Yang、Feng‐Chen Gao、Kai Hong
DOI:10.1002/anie.202315232
日期:2024.1.22
method for accessing sterically encumbered geminal bis(boronates) was developed based on a formal umpolung strategy. The polarity inversion of the readily available 1,1-diborylalkanes allows their corresponding α-halogenated derivatives to undergo a formal substitution with a wide variety of nucleophiles to form C−C, C−O, C−S, and C−N bonds, featuring excellent tolerance to steric hindrance and functional