Whitehead JWF, Lee GP, Gharagozloo P, Hofer P, Gehrig A, Wintergerst P, Smyth D, McCoull W, Hachicha M, Patel A, Kyle DJ. 8-Substituted Analogues of 3-(3-Cyclopentyloxy-4-methoxy-benzyl)-8-isopropyl- adenine: Highly Potent and Selective PDE4 Inhibitors.
J Med Chem 2005;
48:1237-43. [PMID:
15715490 DOI:
10.1021/jm030603w]
[Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
3-(3-Cyclopentyloxy-4-methoxy-benzyl)-8-isopropyl-adenine V11294 (1) has been identified as a lead structure, which selectively inhibits human lung PDE4 (436 nM) and is also active in a number of in vitro and in vivo models of inflammation. Here we describe the synthesis and pharmacology of a series of highly potent 8-[(benzyloxy)methyl]-substituted analogues, with potencies in the range 10-300 nM. In addition, several compounds showed interesting PDE4 subtype specificities, for example, the 3-thienyl derivative 5v, which showed 6-10 nM potency at PDE4B, D3, and D5 and a 20- to 200-fold selectivity over A and D2, respectively.
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