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Synthesis of novel N-phosphonoalkyl dipeptide inhibitors of human collagenase.

Abstract：

:The synthesis of a series of N-phosphonalkyl dipeptides 6 is described. Syntheses were devised that allowed the preparation of single diastereoisomers and the assignment of stereochemistry. The compounds were evaluated in vitro for their ability to inhibit the degradation of radiolabeled collagen by purified human lung fibroblast collagenase. Several of the compounds were potent collagenase inhibitors and were at least 10-fold more potent than their corresponding N-carboxyalkyl analogues. Activity was lost when the phosphonic acid group P(O)(OH)2 was replaced by the phosphinic acid groups P(O)(H)(OH) and P(O)(Me)(OH). At the P1 position, (R)- or (S)-alkyl groups, especially ethyl and methyl (e.g., 12a,b, 52a,b, and 53a,b), or an (R)-phenethyl moiety (55a) conferred high potency (IC50 values in the range 0.23-0.47 microM). (S)-Stereochemistry was preferred for the P1' isobutyl side chain. Structure-activity relationships were also investigated at the P2' site, and interestingly, compounds with basic side chains, such as the guanidine 57a, were equipotent with more lipophilic compounds, such as 52a. As with other series of collagenase inhibitors, potency was enhanced by introducing bicyclic aromatic P2' substituents. The most potent phosphonic acid of the series was the bicyclic aromatic P2' tryptophan analogue 59a (IC50 0.05 microM).

journal_name

J Med Chem

journal_title

Journal of medicinal chemistry

authors

Bird J,De Mello RC,Harper GP,Hunter DJ,Karran EH,Markwell RE,Miles-Williams AJ,Rahman SS,Ward RW

doi

10.1021/jm00027a020

subject

Has Abstract

pub_date

1994-01-07 00:00:00

pages

158-69

issue

1

eissn

0022-2623

issn

1520-4804

journal_volume

37

pub_type

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