Thiourea-Catalyzed Enantioselective Hydrophosphonylation of Imines: Practical Access to Enantiomerically Enriched α-Amino Phosphonic Acids
摘要:
Chiral thiourea 1b catalyzes the highly enantioselective hydrophosphonylation of a wide range of N-benzyl imines. The hydrophosphonylation products are readily deprotected by hydrogenolysis, providing access to free alpha-amino phosphonic acids in highly enantioenriched form.
Thiourea-Catalyzed Enantioselective Hydrophosphonylation of Imines: Practical Access to Enantiomerically Enriched α-Amino Phosphonic Acids
摘要:
Chiral thiourea 1b catalyzes the highly enantioselective hydrophosphonylation of a wide range of N-benzyl imines. The hydrophosphonylation products are readily deprotected by hydrogenolysis, providing access to free alpha-amino phosphonic acids in highly enantioenriched form.
Elektrochemische Decarboxylierung vonL.-Threonin- und Oligopeptid-Derivaten unter Bildung vonN-Acyl-N, O-acetalen: Herstellung von Oligopeptiden mit Carboxamid-oder Phosphonat-C-Terminus
Electrochemical Decarboxylation of L-Threonine and Oligopeptide Derivatives with Formation of N-Acyl-N, O-acetals: Preparation of Oligopeptides with Amide or Phophonate C-Terminus
L-苏氨酸和寡肽衍生物的电化学脱羧反应,形成N-酰基-N,O-乙缩醛:酰胺或膦C-末端制备寡肽
A versatile asymmetric synthesis of α-amino α-alkyl-phosphonic acids of high enantiomeric purity
作者:Stephen Hanessian、Youssef L. Bennani
DOI:10.1016/s0040-4039(00)97092-8
日期:1990.1
A general protocol for the synthesis of α-amino-α- alkyl phosphonic acids in either enantiomeric form is described based on the alkylation of chiral bicyclic phosphonamides derived from (R,R)- and (S,S)-1,2-diaminocyclohexane.
Phosphorus amino acid analogs as inhibitors of leucine aminopeptidase
作者:Peter P. Giannousis、Paul A. Bartlett
DOI:10.1021/jm00392a014
日期:1987.9
A variety of phosphorus amino acid and dipeptide analogues have been synthesized and evaluated as inhibitors of the metalloenzyme leucine aminopeptidase from porcine kidney. Two phosphonate dipeptides were found to be modest inhibitors of the enzyme (8e, Ki = 58 microM; 8h, Ki = 340 microM). The phosphinicacid (17-OH) and phosphinamide (17-NH2) analogues related to bestatin were prepared by condensation
The present invention relates to an enantioselective cation-exchange material, comprising a chiral selector (1), composed of a chiral component (2) and at least one cation-exchange group (X), a spacer (3) and a carrier (4). The cation-exchange material is characterized in that the chiral component (2) has a molecular weight of less than 1,000 and the at least one cation-exchange group (X) is an acid group having a pKa<4.0.
A highly convenient route to optically pure α-aminophosphonic acids
作者:Robert Hamilton、Brian Walker、Brian J. Walker
DOI:10.1016/0040-4039(95)00750-7
日期:1995.6
Pure diasteriomers, obtained simply and directly by reaction of hypophosphorous acid salts of (R)(+) or (S)(−) - N-α-methylbenzylamine with aldehydes, can be simultaneously deprotected and oxidised in one step to provide a highly convenient synthesis of α - aminophosphonic acids in high optical purity.