Zinc/Iron-Mediated Ring Opening of Dibromocyclopropanes for In Situ Diels-Alder Reactions with Electron-Deficient Aldehydes and Imines
作者:Florian Pünner、Gerhard Hilt
DOI:10.1002/ejoc.201300726
日期:2013.9
the carbonyl group of aldehydes, ketones, glyoxylic esters, or imines is necessary for the ring-opening reaction. The ring opening leads to a bromo-functionalized 1,3-diene, which then reacts in situ with the carbonyl group in a hetero-Diels–Alder reaction. The products are formed with high control of the regiochemistry and in good yields for electron-deficient aldehydes and imines, such as carbamates