Evidence against the (π2s + π2a) mechanism for the cycloadditions of allenes
作者:Daniel J. Pasto
DOI:10.1016/0040-4039(80)80140-7
日期:1980.1
The chemoselectivities in the (π4s + π2s) cycloaddition reactions of tetraphenylcyclopentadienone (TPCD) with ethyl- and 1,1-dimethylallene have been determined and are compared with those observed for reaction with maleic anhydride.
Relative reactivities of substituted allenes toward cycloaddition with tetraphenylcyclopentadienone. Further implications on the viability of the concerted (.pi.2s + .pi.2a) cycloaddition process
作者:Daniel J. Pasto、Peter F. Heid
DOI:10.1021/jo00132a048
日期:1982.5
PASTO, D. J.;HEID, P. F., J. ORG. CHEM., 1982, 47, N 11, 2204-2206