A Note on Stereochemical Observations of the Deprotonation of Ethyl 2-Alkenoates
作者:Ernst-Peter Krebs
DOI:10.1002/hlca.19810640407
日期:1981.6.10
Deprotonation of ethyl (E)-2-alkenoates 1, 3 and 4 yields after protonation the double bond migrated (3 Z)-isomers 5, 7 and 9 as major products. In contrast, deprotonation and reprotonation of ethyl (Z)-2-pentenoate (2) gives the (3 E)-isomer 6 exclusively. These findings are explained by reaction paths starting from different ester conformations.