Copper catalyzed oxidative homocoupling of terminal alkynes to 1,3-diynes: a Cu<sub>3</sub>(BTC)<sub>2</sub> MOF as an efficient and ligand free catalyst for Glaser–Hay coupling
coupling of terminalalkynes using a simple Cu3(BTC)2-metal organic framework as a sustainable heterogeneous copper catalyst. A series of symmetrical 1,3-diynes bearing diverse functional groups have been synthesized in moderate to excellent yields via a Cu3(BTC)2 catalyzed Glaser–Hay reaction. The presence of the coordinatively unsaturated open CuII sites in Cu3(BTC)2 catalyzes the homocoupling in the
Chemo-, Regio-, and Stereoselective cis-Hydroboration of 1,3-Enynes: Copper-Catalyzed Access to (Z,Z)- and (Z,E)-2-Boryl-1,3-dienes
作者:Nicklas W. Buchbinder、Long H. Nguyen、Owen N. Beck、Andrew D. Bage、Carla Slebodnick、Webster L. Santos
DOI:10.1021/acs.orglett.4c01929
日期:2024.7.26
alkyne-selective hydroboration of 1,3-enynes is disclosed, providing access to the previously elusive 2-boryl-1,3-dienes. Using CuOAc, Xantphos, and HBpin, Bpin was installed on the internal carbon of a series of symmetric and nonsymmetric 1,3-enynes, affording products with excellent Z:E selectivity. The utility of the 2-boryl-1,3-diene products was demonstrated by transformation to useful functional groups