Palladium(0)-catalyzed asymmetric synthesis of 2-vinylmorpholine and 2-vinylpiperazine. Influence of the biscarbonate structure on the enantioselectivity
M. Massacret et al., Palladium(0)-catalyzed asymmetric synthesis of 2-vinylmorpholine and 2-vinylpiperazine. Influence of the biscarbonate structure on the enantioselectivity, TETRAHEDR-A, 11(17), 2000, pp. 3561-3568
Palladium-catalyzed cyclization of N,N-bis(p-tolylsulfonyl)-o-phenylenediam
ine 2b and 2-[(2,4,6-trimethylphenyl)sulfonyl] aminophenol 2c with three al
lylic biscarbonates 1a-c gave quite different enantioselectivities. This in
dicates that the cyclization processes do not have a common intermediate, a
s in the case of benzene-1,2-diol. (C) 2000 Elsevier Science Ltd. All right
s reserved.