Pd-Catalyzed Borylative Cyclization of Allenynes and Enallenes
作者:Virtudes Pardo-Rodríguez、Juan Marco-Martínez、Elena Buñuel、Diego J. Cárdenas
DOI:10.1021/ol9017694
日期:2009.10.15
Pd-catalyzed cyclization of 1,5- and 1,6-allenynes and 1,5-enallenes with bis(pinacolato)diboron affords synthetically useful allylboronates and alkylboronates under smooth conditions in a formal hydroborylative carbocyclization reaction. One C−C and one C−B bond are formed in a single operation. The reaction outcome implies that different mechanisms operate for the reactions of allenynes and enallenes