Highly potent and selective heptapeptide antagonists of the neurokinin NK-2 receptor
作者:Andrew B. McElroy、Stephen P. Clegg、Martyn J. Deal、George B. Ewan、Russell M. Hagan、Simon J. Ireland、Christopher C. Jordan、Barry Porter、Barry C. Ross
DOI:10.1021/jm00092a008
日期:1992.7
is known to enhance neurokinin NK-2 receptor agonist potency and selectivity with respect to other neurokinin receptors. We now report that replacement of D-Trp9 by D-Pro9 in the nonselective neurokininantagonist [Arg5,D-Trp7,9, Nle11]-SP(5-11) gave a partial agonist with NK-2 receptor selectivity. Further incorporation of Pro10 provided the weak but selective NK-2 antagonist Arg-Ala-D-Trp-Phe-D-Pro-Pro-Nle-NH2
A convenient synthesis of amino acid p-nitroanilides; synthons in the synthesis of protease substrates
作者:Dirk T.S. Rijkers、Hans P.H.M. Adams、H. Coenraad Hemker、Godefridus I. Tesser
DOI:10.1016/0040-4020(95)00671-t
日期:1995.10
A method is described for the synthesis of Nα-protected bi- and trifunctional aminoacid p-nitroanilides. The reaction uses phosphorus oxychloride as the condensing agent. The synthesis is simple, rapid, free of racemization and affords yields between 70–90%. The synthesis can be performed not only with aminoacid derivatives of the urethane type including acid-labile (Z. Boc) and base-labile (Fmoc
Reinvestigation of the Phosphazo Method and Synthesis of<i>N</i>-(<i>t</i>-Butoxycarbonyl)-L-arginine<i>p</i>-Nitroanilide and a Chromogenic Enzyme Substrate for the Factor Xa
Reaction conditions for the phosphazo method were reinvestigated in order to apply this method to the synthesis of p-nitroanilide(pNA)s of t-butoxycarbonyl(Boc)-and benzyloxycarbonyl(Z)-amino acids.