New potent prolyl endopeptidase inhibitors: synthesis and structure-activity relationships of indan and tetralin derivatives and their analogues.

Article Details

Citation

Copy to clipboard

Tanaka Y, Niwa S, Nishioka H, Yamanaka T, Torizuka M, Yoshinaga K, Kobayashi N, Ikeda Y, Arai H

New potent prolyl endopeptidase inhibitors: synthesis and structure-activity relationships of indan and tetralin derivatives and their analogues.

J Med Chem. 1994 Jun 24;37(13):2071-8.

PubMed ID

8027988 [ View in PubMed

]

Abstract

New compounds were synthesized by structural modification of 1-[1-(4-phenylbutanoyl)-L-prolyl]-pyrrolidine (SUAM-1221, 1) or 1-[1-(benzyloxycarbonyl)-L-proly]prolinal (Z-Pro-prolinal,2) and were tested for in vitro inhibitory activities against purified prolyl endopeptidase (PEP) from canine brain. In a series of compounds which lack a formyl or a cyano group, 3-[3-[(S)-2-(1,2,3,4-tetrahydronaphthyl)acetyl]-L- thioprolyl]thiazolidine (13) exhibited an approximately 20-fold (IC50 = 2.3 nm) increase in potency compared with 1. Compounds having a formyl or a cyano group showed much more potent inhibitory activities than those which lack such a functional group. Among all compounds tested in vitro, 1-[1-(2-indanylacetyl)-L-prolyl]prolinal (27), 1-[1-[(S)-2-(1,2,3,4-tetrahydronaphthyl)acetyl]-L- prolyl]prolinal (29), 1-[3-[(S)-2-(1,2,3,4-tetrahydronaphthyl)-acetyl]-L-thioprolyl]p rolinal (30), (S)-2-cyano-1-[2-[(S)-2-(1,2,3,4-tetrahydronaphthyl)acetyl]-L- prolyl]pyrrolidine (34), and (S)-2-cyano-1-[3-[(S)-2-(1,2,3,4-tetrahydronaphthyl)acetyl]-L- thioprolyl]pyrrolidine (35) showed an approximately 2-fold (IC50 congruent to 0.5 nM) increase in potency compared with 2. The structure-activity relationships of these compounds are discussed.

DrugBank Data that Cites this Article

Binding Properties

Drug	Target	Property	Measurement	pH	Temperature (°C)
Z-Pro-Prolinal	Prolyl endopeptidase	IC 50 (nM)	1.1	N/A	N/A	Details