1-PyrrolIdinecarboxylic acid, methyl ester

S,4S) -N-tert-Butyl oxy carbonyl-4-di phenyl phosphmo-2-di phenyl phosphi nomethyl pyrrolidine 1-Pyrrolidinecarboxylic acid, 4-(diphenylphosphino)-2-[(diphenylphosphino)methyl]-, 1,1-dimethylethyl ester, (2S-cis)- (9) (61478-28-2)... 

Propanoic acid, 3-(methylnitrosamino)-, methyl ester Propanoic acid, 2-(methylnitrosamino)-3-phenyl-2-Pyrrolidinecarboxylic acid, 1-nitroso-, methyl ester... 

Many communications have concentrated on specific amino phosphonic acids or derivative types. Thus, esters of phosphonoaminoacetic add were obtained by the reactions between trialkyl (ethyl) phosphite and (218) and which are thought to proceed via the phosphorane (219). A sequence has been presented for the preparation of the mono- and di-benzyl esters of N-chz protected (a-aminoben-zyl)phosphonic acid. A synthesis of (aminomethylene)bisphosphonic acid from dibenzylamine, dibenzyl hydrogenphosphonate and triethyl orthoformate has been noted and the asymmetric hydrogenation of (220) in the presence of chiral phosphine catalysts yields samples of (221) with e.e.s of 63-96%. The pyrrolidine-based compound (222) has been prepared from methyl S)-N-methoxycarbonyl-4-oxo-2-pyrrolidinecarboxylate and iV-coupled 4-amino-butanal diethyl acetals were the starting materials in syntheses of the pyrrolidine-2-phosphonic add derivatives (223) in which Z represents the iV-protected amino add or peptide moiety. ... 

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