Synthesis of Benzyl-, Allyl-, and Allenyl-boronates via Copper-Catalyzed Borylation of Alcohols
作者:Lujia Mao、Kálmán J. Szabó、Todd B. Marder
DOI:10.1021/acs.orglett.7b00256
日期:2017.3.3
Alcohols are among the most abundant and readily available organic feedstocks in industrial processes. The direct catalytic functionalization of sp3 C–O bonds of alcohols remains the main challenge in this field. Here, we report a copper-catalyzed synthesis of benzyl-, allyl-, and allenyl-boronates from benzylic, allylic, and propargylic alcohols, respectively. This protocol exhibits a broad reaction
Palladium-Catalyzed Oxidative Borylation of Allylic C–H Bonds in Alkenes
作者:Lujia Mao、Rüdiger Bertermann、Simon G. Rachor、Kálmán J. Szabó、Todd B. Marder
DOI:10.1021/acs.orglett.7b03296
日期:2017.12.15
palladium pincer complex-catalyzed allylic C–H borylation of alkenes. The transformation exhibits high regio- and stereoselectivity with a variety of linear alkenes. A synthetically useful feature of this allylic C–H borylation method is that all allyl-Bpin products can be isolated in usually high yields. Preliminary mechanistic studies indicate that this C–H borylation reaction proceeds via Pd(IV) pincer
Assembly of Tetrahydropyran Derivatives from Aldehydes, Allylboronates, and Syngas by Asymmetric Relay Catalytic Cascade Reaction
作者:Lu-Lu Li、Yong-Liang Su、Zhi-Yong Han、Liu-Zhu Gong
DOI:10.1002/chem.201801197
日期:2018.5.28
An efficient synthesis of highly enantio‐enriched tetrahydropyrans from readily available aldehydes, allylboronates, and syngas has been established by multiply relay catalysis of rhodium and chiral phosphoric acid. The cascade reaction integrates the asymmetric allylboration of aldehydes and alkene hydroformylation, providing a structurally diverse range of products with different workup procedures