Cyclometalation of dialkylbis(triethylphosphine)platinum(II) complexes: formation of Pt,Pt-bis(triethylphosphine)platinacycloalkanes
作者:Robert DiCosimo、Stephen S. Moore、Allan F. Sowinski、George M. Whitesides
DOI:10.1021/ja00365a024
日期:1982.1
activation for reactions which form fourand five-membered platinacycloalkanes is small (AAG| 4 kcal mol-'); that for reactions which form fourand six-membered rings is smaller (AAG+ 0 kcal mol-t). We identify these values of AAG+ with estimates of the strain energies of these rings, assuming the strain energy of the platinacyclohexane is small. The important conclusion from these studies is that the strain energy
Synthesis of (±)-6-protoilludene and (±)-3-EPI-6-protoilludene by intramolecular magnesium-ene- and ketene/alkene addition reactions
作者:Wolfgang Oppolzer、Akio Nakao
DOI:10.1016/s0040-4039(00)85240-5
日期:1986.1
The sesquiterpene (±)-6-protoilludene () and its C(3)-epimer were synthesized from aldehyde . The key steps are a regio- and stereo-selective type-I-magnesium-ene reaction → and an intramolecular vinylketene/alkeneaddition → + .