Diastereoselective synthesis of 4-substituted 2-amino-4-phosphonobutanoic acids
摘要:
Conjugate additions of the lithiated bis-lactim ether derived from cyclo-[Gly-D-Val] 1 to alpha-substituted vinylphosphonates 2 or electrophilic substitutions on the lithiated bis-lactim ether derived from cyclo-[L-AP4-D-Val] 5 allow direct and stereoselective access to a series of 4-substituted AN derivatives 3 in enantiomerically pure form. (C) 2002 Elsevier Science Ltd. All rights reserved.
Diastereoselective synthesis of 4-substituted 2-amino-4-phosphonobutanoic acids
摘要:
Conjugate additions of the lithiated bis-lactim ether derived from cyclo-[Gly-D-Val] 1 to alpha-substituted vinylphosphonates 2 or electrophilic substitutions on the lithiated bis-lactim ether derived from cyclo-[L-AP4-D-Val] 5 allow direct and stereoselective access to a series of 4-substituted AN derivatives 3 in enantiomerically pure form. (C) 2002 Elsevier Science Ltd. All rights reserved.
Diastereoselective Synthesis of 2-Amino-4-phosphonobutanoic Acids by Conjugate Addition of Lithiated Schöllkopf's Bislactim Ethers to Vinylphosphonates
作者:María Ruiz、M. Carmen Fernández、Aniana Díaz、José M. Quintela、Vicente Ojea
DOI:10.1021/jo034707q
日期:2003.10.1
Conjugateadditions of lithiatedbislactimethers derived from cyclo-[Gly-Val] and cyclo-[Ala-Val] to alpha-, beta-, or alpha,beta-substituted vinylphosphonates allow direct and stereoselective access to a variety of 3- or 4-monosubstituted and 2,3-, 2,4-, or 3,4-disubstituted 2-amino-4-phosphonobutanoic acids (AP4 derivatives) in enantiomerically pure form. The relative stereochemistry was assigned