Synthesis of the penta-glutamyl derivative of<i>N</i>-[4-[<i>N</i>-[3-(2,4-diamino-1,6-dihydro-6-oxo-5-pyrimidinyl)-propyl]amino]benzoyl]-L-glutamic acid (5-DACTHF). An acyclic analogue of tetrahydrofolic acid
作者:Virgil L. Styles、James L. Kelley
DOI:10.1002/jhet.5570270654
日期:1990.9
N-[4-[N-[3-(2,4-diamino-1,6-dihydro-6-oxo-5-pyrimidinyl)propyl]amino]-benzoyl)-L-glutamic acid (1, 5-DACTHF, 543U76) was synthesized by a convergent route. L-γ-Glutamyl-L-γ-glutamyl-L-γ-glutamyl-L-γ-glutamyl-L-γ-glutamyl-L-glutamic acid heptakis t-butyl ester (20) was prepared in ten steps from L-glutamic acid di-t-butyl ester and N-(benzyloxycarbonyl)-L-glutamic acid α-t-butyl ester. 4-[N-[3-(2,4-Diamino-1
In order to examine the lipotropic and hypotensive effects of glutamylcholines, α-and γ-(Z-and Boc-glutamyl) cholines (4a, 4'a, 4b and 4'b) were synthesized by the removal of the tert-butyl and benzyl groups of the corresponding tert-butyl (3a and 3'a) and benzyl (3b and 3'b) choline esters which were obtained by the esterification of tert-butyl Z-glutamates (1a and 1'a) and benzyl Boc-glutamate dicyclohexylamine salts (1b and 1'b) with N, N-dimethylaminoethyl chloride, followed by methylation with methyl halide.
Highly potent, orally active diester macrocyclic human renin inhibitors
作者:Ann E. Weber、Mark G. Steiner、Philip A. Krieter、Adria E. Colletti、James R. Tata、Thomas A. Halgren、Richard G. Ball、John J. Doyle、Terry W. Schorn
DOI:10.1021/jm00099a004
日期:1992.10
moiety of inhibitor 4o with a variety of substituents led to subnanomolar inhibitors, one of which (the "3(S)-quinuclidinyl-Phe" derivative 33) lowered blood pressure 20 mmHg and completely inhibited plasma renin activity for 6 h in sodium-depleted rhesus monkeys. This compound proved to have limited bioavailability (1% in rats) due to cleavage of the serine ester bond and rapid hepatic extraction.
The Synthesis of (2<i>S</i>)-4,4-Difluoroglutamyl γ-Peptides Based on Garner’s Aldehyde and Fluoro-Reformatsky Chemistry
作者:James K. Coward、David W. Konas、Jessica J. Pankuch
DOI:10.1055/s-2002-35616
日期:——
development of optically active fluorinated synthetic buildingblocks of general utility is a current goal of organofluorine chemists. The serine-derived Garner aldehyde was converted to a general 4,4-difluoroamino acid buildingblock via fluoro-Reformatsky reaction with ethyl bromodifluoroacetate. The utility of this buildingblock was demonstrated by the synthesis of derivatives of(2S)-4,4-difluoroglutamine
Polypeptides. Part XVIII. Syntheses of poly-(β-aspartic acid) and poly-(γ-glutamic acid) and their benzyl esters
作者:P. M. Hardy、J. C. Haylock、H. N. Rydon
DOI:10.1039/p19720000605
日期:——
L-aspartate) has been prepared by the polymerisation of α-benzyl β-N-succinimidyl L-aspartate and converted into poly-(β-L-aspartic acid) by hydrogenolysis; treatment of the poly(benzyl ester) with hydrogen bromide in acetic acid leads to a different polymer containing a substantial proportion of aspartimide residues. The analogous route cannot be used for the preparation of poly-(α-benzyl L-glutamate)