Acid catalysis induces a total change from retention to inversion of configuration in CO<sub>2</sub>elimination from β-lactones
作者:Johann Mulzer、Matthias Zippel
DOI:10.1039/c39810000891
日期:——
medium the stereochemistry of the CO2 elimination from cis-3-t-butyl-4-(p-methoxyphenyl)oxetan-2-one (1a) and from cis-3-t-butyl-4-phenyloxetan-2-one (1b) gradually changes from totalretention to totalinversion of configuration, so that sterically pure (Z)- and (E)-3,3-dimethyl-1-(p-methoxyphenyl)but-1-ene (3a) and (7a) and (Z)- and (E)-3,3-dimethyl-1-phenylbut-1-ene (3b) and (7b) may be obtained from
Hammett-correlations, solvent effects and stereochemistry of the thermal decarboxylation of 2-oxetanones - evidence for a zwitterionic intermediate
作者:Johann Mulzer、Matthias Zippel
DOI:10.1016/s0040-4039(00)71463-8
日期:1980.1
Kinetic and stereochemical data of the thermal decarboxylation of 2-oxetanones ( and ) indicate that the reaction proceeds via a zwitterionic intermediate Z.