Synthesis and some biological properties of the hexapeptide analog of substance P with a C-terminal thioamide group
Kruszyński, M.; Kupryszewski, G.; Misterek, K.; Gumułka, S.
Polish Journal of Pharmacology and Pharmacy 42(5): 483-490
1990
ISSN/ISBN: 0301-0244 PMID: 1711685 Document Number: 358302
A new hexapeptide analog of Substance P, containing a C-terminal thioamide group in the molecule [( Glp6, Mett11]SP6-11) was synthesized: Glp-Phe-Phe-Gly-Leu-Mett-NH2. Conversion to thioamide was accomplished from tert-butoxycarbonyl-L-methionine amide (Boc-Met-NH2) using Lawesson's Reagent. Its contracting activity on isolated guinea-pig ileum was considerably lower than that of [Glp6]SP6-11.