Octacarbonyldicoblat-Inauced (1,3) H Shits in 1-Methylallenecarboxylates and Allenic Lactones
作者:Latchezar S. Trifonov、Alaxander S. Orahovats、Heinz Heimgartner
DOI:10.1002/hlca.19870700419
日期:1987.7.8
The allenecarboxylates 1a,b and alleniclactones 4a,b undergo thermally induced (1,3) H Shifts in the presence of Co2(CO)8. The non-isolated 1,3-dienes 2a,b react further affording the Diels-Alder Adducts 3a,bScheme 1 in high yields. These adducts were not formed in the case of the 2-vinybutenolides 5a,b. On irradiationin the presence of Co2(CO)8 or Mn2(Co)10, the studied allenes reacted in a different