DEMARCHI, BERNARD;VOGEL, PIERRE, TETRAHEDRON LETT., 28,(1987) N 20, 2239-2242
作者:DEMARCHI, BERNARD、VOGEL, PIERRE
DOI:——
日期:——
DEMARCHI, BERNARD;VOGEL, PIERRE;PINKERTON, ALAN A., HELV. CHIM. ACTA, 71,(1988) N 5, 1249-1267
作者:DEMARCHI, BERNARD、VOGEL, PIERRE、PINKERTON, ALAN A.
DOI:——
日期:——
TandemDiels-Alder Reactivity Controlled by Remote Substituents. Regioselective synthesis of linearly annellated six-membered ring systems from (1RS,5SR,6RS,7SR)-6,7-bis(chloromethyl)-8,9-dimethylidene-2-oxabicyclo[3.2.2]nonan-3-one. Crystal structure of (1RS,5RS,6SR,11RS)-6,7-bis(chloromethyl)-3-oxo-2-oxatricyclo[7.4.0.1,5]tridec-8-en-11-yl methyl ketone
作者:Bernard Demarchi、Pierre Vogel、Alan A. Pinkerton
DOI:10.1002/hlca.19880710537
日期:1988.8.10
constants of the two successive Diels-Alder additions of a given dienophile to 12 and 13 were nearly the same. Lewis-acid-catalyzed Diels-Alder addition of methylvinyl ketone to 14 gave adduct 39 with high regio- and stereoselectivity. Lewis acids isomerized 39 into(1RS,5RS,6SR,7SR,11RS)-6,7-bis(chloromethyl)-3-oxo-2-oxatricyclo[7.4.0.01,5]tridec-8-en-11-yl methyl ketone (40) whose structure was determined