A supramolecular complex for investigating the thermodynamic properties of intermolecular aromatic stackinginteractions has been developed. The conformation of the complex is locked in a single well-defined conformation by an array of H-bonding interactions that force two aromatic rings on one end of the complex into a stacked geometry. Chemical double-mutant cycles have been used to measure an anthracene-aniline
作者:Christopher A. Hunter、Andrea Spitaleri、Salvador Tomas
DOI:10.1039/b506093a
日期:——
Hydrogen bond directed folding of a synthetic polyamide was studied in chloroform solution, and the three-dimensional structure of the foldamer determined using 1H NMR chemical shifts.
Pyrrolamidocalix[4]arenes 1-4, members of a new class of anion receptors bearing pyrrolic units at the upper rim of calix[4]arene macrocycle, have been readily synthesized in good yields. Derivatives 1 and 3, with unsubstituted pyrrole units, Show a good selectivity for H2PO4 over F and AcO-, while the presence of electron-withdrawing NO2 substituents in 2 and 4 inverts the selectivity favoring more basic AcO- and F-. In addition, it is demonstrated that the flexibility of calix[4]arene skeleton, present in 1 but absent in 3, is very important in the fitting process that leads the amidopyrrole moieties to wrap the tetrahedral H2PO4- guest. (C) 2009 Elsevier Ltd. All rights reserved.
Novel non-steroidal/non-anilide type androgen antagonists: discovery of 4-substituted pyrrole-2-carboxamides as a new scaffold for androgen receptor ligands
We designed and synthesized novel pyrrole-2-carboxamide derivatives as androgen antagonists. Compounds 10 and 13 bearing benzylamine or aniline at the 4-position of the pyrrole ring showed moderate androgen antagonistic activity, and inhibited the androgen-dependent growth of Shionogi carcinoma cells (SC-3). Study of the structure-activity relationships of compound 13 led to a potent androgen antagonist 36, which has higher affinity than flutamide (4) for androgen nuclear receptor (AR). Thus, pyrrole-2-carboxamide is a new scaffold for developing AR antagonists. (c) 2005 Elsevier Ltd. All rights reserved.
BOATMAN R. J.; WHITLOCK H. W., J. ORG. CHEM. <JOCE-AH>, 1976, 41, NO 18, 3050-3051