Copper-catalyzed addition of diboron reagents to α,β-acetylenic esters: efficient synthesis of β-boryl-α,β-ethylenic esters
作者:Ji-Eon Lee、Jisook Kwon、Jaesook Yun
DOI:10.1039/b716697d
日期:——
The efficient copper-catalyzedaddition reaction of bis(pinacolato)diboron to alpha,beta-acetylenic esters has been developed, which produces the corresponding beta-borylated-alpha,beta-ethylenic esters in high yields under mild reaction conditions.
Boron-enabled geometric isomerization of alkenes via selective energy-transfer catalysis
作者:John J. Molloy、Michael Schäfer、Max Wienhold、Tobias Morack、Constantin G. Daniliuc、Ryan Gilmour
DOI:10.1126/science.abb7235
日期:2020.7.17
Isomerization-based strategies to enable the stereodivergent construction of complex polyenes from geometrically defined alkene linchpins remain conspicuously underdeveloped. Mitigating the thermodynamic constraints inherent to isomerization is further frustrated by the considerations of atom efficiency in idealized low–molecular weight precursors. In this work, we report a general ambiphilic C3 scaffold that can