Privileged structure based ligands for melanocortin receptors—4,4-Disubstituted piperidine derivatives.
Bioorg Med Chem Lett 2006;
16:3843-6. [PMID:
16697186 DOI:
10.1016/j.bmcl.2006.04.016]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2006] [Revised: 04/07/2006] [Accepted: 04/07/2006] [Indexed: 10/24/2022]
Abstract
Homologation and cyclization back to the chiral methine of compound 3 yields achiral 4,4-disubstituted piperidine privileged structures (e.g., 8a) useful in the construction of melanocortin 4 receptor (MC4R) ligands. The piperidine nitrogen was replaced with carbon, oxygen, sulfur, and sulfone with minor erosion of binding. The methyl cyclohexane substituent was the most potent while significant affinity was still seen for smaller lipophilic groups such as ethyl.
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