Palladium-mediated reductive coupling, a stereoselective approach to the 8-dehydropumiliotoxin skeleton
作者:Stephanie A. Feutran、Helena McAlonan、Paul J. Stevenson、Andrew D. Walker
DOI:10.1016/j.tetlet.2009.03.122
日期:2009.7
Reductive cyclisation of an E-vinyl bromide with an allylic acetate proceeds under palladium catalysis to give the 8-dehydropumiliotoxin skeleton, a potential advanced precursor to 8-deoxypumiliotoxin alkaloids. Control of the stereochemistry of the E-vinyl bromide precursor is achieved readily using the Kogen or Bruckner bromophosphonate reagents and the reductive cyclisation proceeds with retention