Highly diastereoselective monoalkylation and Michael addition of N- (diphenylmethylene)glycinesultam under solid-liquid phase-transfer catalysis conditions using potassium carbonate as base
Treatment of a sultam-derived N-(diphenylmethylene)glycinate equivalent 1 with activated (allylic and propargylic) organic bromides and with Michael acceptors under solid-liquid phase-transfer catalysis conditions, using potassium carbonate as base, affords the monoalkylated compounds with high diastereoselectivity (>97% d.e.).
Lopez, Anna,Pleixats, Roser
p. 1967 - 1977
(2007/10/03)
N-(Boc)-L-(2-bromoallyl)-glycine: A versatile intermediate for the synthesis of optically active unnatural amino acids
N(Boc)-L-(2-bromoallyl)-glycine (1) was synthesized from diethylacetamidomalonate and 2,3-dibromopropene in a one-pot procedure (75% overall yield). The enantiomers were efficiently separated via a tandem biocatalytic kinetic hydrolytic resolution. 1 was
Leanna,Morton
p. 4485 - 4488
(2007/10/02)
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