Congener derivatives and conjugates of histamine: synthesis and tissue and receptor selectivity of the derivatives
摘要:
A series of 19 congener derivatives and conjugates of histamine was synthesized and tested to determine whether the ligands would alter the conventional histamine activity in various tissues. The derivatives, which contained either branched or unbranched aliphatic groups, aromatic amide groups, or dipeptides, exhibited affinities for histamine type 1 and/or type 2 receptors that were widely different from the progenitor. The p-trifluoromethyl derivative of histamine with an intermediate chain length of four methylenes (compound 13) was the most potent lymphocytes H2 receptor agonist but was inactive on guinea pig myocardium H2 receptors. The deletion of a single methylene chain (compound 12) from this compound resulted in total loss of its H2 activity on lymphocytes and its H1 activity on aorta. Compound 12 became an exclusive H1 agonist on lymphocytes H1 receptors. The dipeptide conjugate (compound 17) and the aliphatic congener derivative (compound 18), both with four methylenes, retained some of the activity on guinea pig myocardium H2 receptors, but lost their activity on lymphocytes H2 receptors. Therefore, histamine can be modified at sites that are at a distance from the imidazole moiety, resulting in tissue selective histamine receptor agonists.
Conjugates of catecholamines. 1. N-Alkyl-functionalized carboxylic acid congeners and amides related to isoproterenol
作者:Kenneth A. Jacobson、Debra Marr-Leisy、Roberto P. Rosenkranz、Michael S. Verlander、Kenneth L. Melmon、Murray Goodman
DOI:10.1021/jm00358a007
日期:1983.4
substituted amide. The compounds were prepared generally via the reductive amination of norepinephrine with a keto acid or a preformed keto amide. An alternate synthesis of the model amide derivatives, involving activation of the carboxylic acid congeners and coupling with amines, was complicated in the case of short-chain derivatives by facilecyclization to lactams. In vitro evaluation of these compounds
Beta-adrenergic antagonist compounds and derivatives of beta-adrenergic antagonists
申请人:THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
公开号:EP0117089A1
公开(公告)日:1984-08-29
Molecular structures of β-adrenergic antagonists are modified to produce biologically active compounds. The β-antagonists are modified to form molecules of the general structure:
wherein R is most generally R"-OCH2-, and in some instances is R"-, and R" = an aryl or substituted aryl moiety;
R' = -H, -CH3, or a short chain alkyl moiety; and Y = -OH, or more usually, -OAX or -NHAX, where
A = an alkyl, aryl, or aralkyl moiety, and
X = a terminal grouping, such as -CH3, -CF3 or -(CH2)nCOOH; or AX may be a carrier moiety consisting of a defined peptide or protein.
对β-肾上腺素能拮抗剂的分子结构进行改造,以产生具有生物活性的化合物。对 β-肾上腺素能拮抗剂进行修饰,形成具有一般结构的分子:
其中 R 一般为 R"-OCH2-,在某些情况下为 R"-,R" = 芳基或取代芳基;
R' = -H、-CH3 或短链烷基;以及 Y = -OH,或更常见的 -OAX 或 -NHAX,其中
A = 烷基、芳基或芳烷基分子,以及
X = 末端基团,如-CH3、-CF3 或-(CH2)nCOOH;或者 AX 可以是由定义的肽或蛋白质组成的载体分子。
JACOBSON, K. A.;MARR-LEISY, D.;ROSENKRANZ, R. P.;VERLANDER, M. S.;MELMON,+, J. MED. CHEM., 1983, 26, N 4, 492-499
作者:JACOBSON, K. A.、MARR-LEISY, D.、ROSENKRANZ, R. P.、VERLANDER, M. S.、MELMON,+
DOI:——
日期:——
KHAN, M. M.;MELMON, K. L.;MARR-LEISY, D.;VERLANDER, M. S.;EGLI, M.;LOK, S+, J. MED. CHEM., 30,(1987) N 11, 2115-2120
作者:KHAN, M. M.、MELMON, K. L.、MARR-LEISY, D.、VERLANDER, M. S.、EGLI, M.、LOK, S+