Phosphonium ylide-catalyzed cyclotrimerization of ethyl propynoate
The cyclotrimerization of ethyl propynoate (2) to yield aromatic triesters is shown to proceed via consecutive [2 + 2] cycloadditions of ethoxycarbonylmethylenetriphenylphosphonium ylide (1) to three moles of (2), followed by cyclization and elimination o
Labuschagne, A. Johan H.,Malherbe, Johan S.,Meyer, Cornelius J.,Schneider, David F.
MECHANISTIC ASPECTS OF THE REACTION OF SOME PHOSPHONIUM YLIDES WITH ALKYL PROPYNOATES
The reaction of alkoxycarbonylmethylentriphenylphosphonium ylides 7 with alkyl propynoates 6 in dichloromethane proceeds via cycloaddition rather than Michael addition, to lead to stabilised phosphonium ylides.
Barluenga, Jose,Lopez, Fernando,Palacios, Francisco,Sanchez-Ferrando, Francisco
p. 381 - 384
(2007/10/02)
SYNTHESIS AND FRAGMENTATION-CONDENSATION REACTIONS OF 1,3-DIETHOXYCARBONYLALLYLIDENETRIPHENYLPHOSPHONIUM YLIDE
Alkylidenephosphonium ylides with ethoxycarbonyl substituents in the α-position fragment in a retro-Michael fashion during condensation with aldehydes.
Labuschagne, A. Johan H.,Schneider, David F.
p. 4135 - 4138
(2007/10/02)
More Articles about upstream products of 119930-16-4