α-C–H borylation of secondary alcohols <i>via</i> Ru/Fe relay catalysis: building a platform for alcoholic C–H/C–O functionalizations
作者:Qing Zhu、Zeyu He、Lu Wang、Yue Hu、Chungu Xia、Chao Liu
DOI:10.1039/c9cc06135e
日期:——
unprecedented α-C–H borylation of secondary alcohols was successfully achieved and delivered various tertiary α-boryl alcohols via [Ru]/[Fe] relay catalysis. The dehydrogenation catalyst (Ru) and borylation catalyst (Fe) interacted to increase the chemoselectivity. By installing the “platform functional group” Bpin via this α-C–H borylation, several alcoholic α-C–H and C–O bond functionalizations were
Base-promoted, deborylative secondary alkylation of N-heteroaromatic N-oxides with internal gem-bis[(pinacolato)boryl]alkanes: a facile derivatization of 2,2′-bipyridyl analogues
作者:Chiwon Hwang、Woohyun Jo、Seung Hwan Cho
DOI:10.1039/c7cc03731g
日期:——
A base-promoted, secondary alkylation of N-heteroaromatic N-oxides using internal gem-bis[(pinacolato)boryl]alkanes as alkylation reagents is reported. The reaction exhibit broad scope, providing deoxygenated secondary alkylated N-heteroaromatic compounds with high efficiency. The usefulness of the developed protocol is evidenced by sequential direct alkylation of 2,2′-bipyridine-N-oxide.
Difunctionalization of ketones <i>via gem</i>-bis(boronates) to synthesize quaternary carbon with high selectivity
作者:Purui Zheng、Yujie Zhai、Xiaoming Zhao、Tao XU
DOI:10.1039/c8cc07781a
日期:——
quaternary centres from ketones via the diborylation process and Suzuki–Miyaura cross-coupling reaction. This methodology, which simultaneously introduces two different kinds of electrophilic structures, exhibits a large substrate scope and high functional group tolerance. The reaction products with aldehyde and allylic groups have proved to be versatile synthons to prepare complex molecules crucial for natural
Synthesis of α-Haloboronates by the Halogenation of <i>gem</i>-Diborylalkanes via Tetracoordinate Boron Species
作者:Shangteng Liao、Jinchao Liang、Chaokun Li、Nan Chen、Kai Yang、Jinglong Chen、Qiuling Song
DOI:10.1021/acs.orglett.3c00982
日期:2023.4.28
applications in organic chemistry as synthetic synthons; however, traditional synthetic methods of α-haloboronates are harsh and complicated. Herein, we used nBuLi as the nucleophilic reagent to attack the boron atom in gem-diborylalkanes to form tetracoordinate boron species and successfully achieved α-chloroboronates and α-bromoboronates with readily accessible electrophilichalogen reagents (NCS and