Multifaceted Substrate–Ligand Interactions Promote the Copper-Catalyzed Hydroboration of Benzylidenecyclobutanes and Related Compounds
作者:Taeho Kang、Tuğçe G. Erbay、Kane L. Xu、Gary M. Gallego、Alexander Burtea、Sajiv K. Nair、Ryan L. Patman、Ru Zhou、Scott C. Sutton、Indrawan J. McAlpine、Peng Liu、Keary M. Engle
DOI:10.1021/acscatal.0c03622
日期:2020.11.6
A unified synthetic strategy to access tertiary four-membered carbo/heterocyclic boronicesters is reported. The use of a Cu(I) catalyst in combination with a modified 1,2-bis(diphenylphosphino)benzene (dppbz) ligand enables regioselective hydroboration of various trisubstituted benzylidenecyclobutanes and carbo/heterocyclic analogs. The reaction conditions are mild, and the method tolerates a wide
A general catalytic synthetic strategy for highly strained methylenecyclobutanes and spiromethylenecyclobutanes
作者:Haotian Zhao、Yu Lin、Mingyu Jiang、Bo Su
DOI:10.1039/d3sc01103h
日期:——
Highlystrained methylenecyclobutanes (MCBs) are intriguing scaffolds in synthetic chemistry and drug discovery, but there is no such strategy that enables the synthesis of structurally diverse MCBs with defined stereochemistry. We report a general synthetic strategy for (boromethylene)cyclobutanes (BMCBs) and spiro-BMCBs by a challenging Cu-catalyzed highly chemo-, stereo-, and regioselective borylative
作者:Kateryna Prysiazhniuk、Oleksandr Polishchuk、Stanislav Shulha、Kyrylo Gudzikevych、Oleksandr P. Datsenko、Vladimir Kubyshkin、Pavel K. Mykhailiuk
DOI:10.1039/d3sc06600b
日期:——
A one-step approach to borylated cyclobutanes from amides of carboxylic acids and vinyl boronates is elaborated. The reaction proceeds via the thermal [2 + 2]-cycloaddition of in situ-generated keteniminium salts.