MEHTA, G.;SUBRAHMANYAM, D., TETRAHEDRON LETT., 30,(1989) N0, C. 2709-2712
作者:MEHTA, G.、SUBRAHMANYAM, D.
DOI:——
日期:——
MITSCHKA, R.;OEHLDRICH, J.;TAKAHASHI, K.;COOK, J. M.;WEISS, U.;SILVERTON,+, TETRAHEDRON, 1981, 37, N 25, 4521-4542
作者:MITSCHKA, R.、OEHLDRICH, J.、TAKAHASHI, K.、COOK, J. M.、WEISS, U.、SILVERTON,+
DOI:——
日期:——
Tandem cyclisations involving α-ketenyl alkyl radicals. New syntheses of the natural triquinanes pentalenene and modhephene
作者:Benoît De Boeck、Nicole M. Harrington-Frost、Gerald Pattenden
DOI:10.1039/b413817c
日期:——
New synthetic approaches to the angular and propellane sesquiterpene triquinanes (+/-)-pentalenene 2 and (+/-)-modhephene 3, respectively, are described. The syntheses are based on tandemcyclisations involving alpha-ketene alkyl radical intermediates produced from alpha,beta-unsaturated acyl radical species, as highlighted in Schemes 2 and 4.