SYPER, LUDWIK, TETRAHEDRON, 43,(1987) N 12, 2853-2871
作者:SYPER, LUDWIK
DOI:——
日期:——
Reaction of α,β-unsaturated aldehydes with hydrogen peroxide catalysed by benzeneseleninic acids and their precursors
作者:Ludwik Syper
DOI:10.1016/s0040-4020(01)86890-3
日期:1987.1
Oxidation of α,β-unsaturated aldehydes with hydrogenperoxide catalysed by benzeneseleninic acids and their precursors has been investigated. Bis 2-nitrophenyl diselenide has proved to be the most effective catalyst. The major products resulting from the oxidation are vinyl formates (a) which on hydrolysis give saturated aldehydes or ketones (g) having the carbon chain shortened by one carbon atom
Dipolar cyclization reactions in heterocyclic synthesis: a novel route to furanophanes
作者:Wolfgang Eberbach、Norbert Laber
DOI:10.1016/s0040-4039(00)77672-6
日期:1992.1
The multistep transformation of 2,3-bridged butenynyl oxiranes 8 into furanophanes 12 involving bridgehead olefins 11 as key intermediates is described. The two lower members of 12 undergo rapid air oxidation resulting in the formation of the dienediones 14a,b. 14b is converted by base into the bicyclo[6.3.0]undecadienone 15.