Stereoselective synthesis of non-proteinogenic amino acids
The lactam enolate of the protected pyroglutamic acid ester (1) has been shown to react with activated imines to yield optically pure derivatives of non-proteinogenic amino acids.
Bowler, Andrew N.,Doyle, Paul M.,Hitchcock, Peter B.,Young, Douglas W.
p. 10545 - 10554
(2007/10/03)
Aromatic Heteroannulation via Metalation-Cyclization of N-Acyl-2-chlorobenzenesulfonamides and N-Acylbenzenesulfonamides
N-Acyl-2-chlorobenzenesulfonamides 7a-d undergo competitive metal-halogen exchange and ortho-deprotonation or α-deprotonation reactions when treated sequentially with sodium hydride and n-butyllithium.The o-lithio intermediates derived from metal-halogen
Hermann, Christine K. F.,Campbell, James A.,Greenwood, Thomas D.,Lewis, Judith A.,Wolfe, James F.
p. 5328 - 5334
(2007/10/02)
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