Two-colour screening in combinatorial chemistry: prospecting for enantioselectivity in a library of steroid-based receptors
作者:Vicente del Amo、Adam P. McGlone、José M. Soriano、Anthony P. Davis
DOI:10.1016/j.tet.2009.06.018
日期:2009.8
The screening of resin-bound combinatorial libraries with pairs of dye-tagged substrates is a powerful strategy for discovering selective receptors. However, implementation has been hampered by a lack of complementary but chemically similar dyes. We now show that the well-established Disperse Red 1 and the recently-introduced Bristol Blue 1 can be used in parallel to synthesise 'pseudoenantiomeric' analogues of N-acetyl-alpha-amino acids and of the anti-inflammatory drug Naproxen. A steroid-based receptor library has been prepared and screened with these substrates. Preliminary results suggest that some members may be highly enantioselective receptors for N-acetyl-alpha-amino acids. (C) 2009 Elsevier Ltd. All rights reserved.
Differentially-protected steroidal triamines; scaffolds with potential for medicinal, supramolecular, and combinatorial chemistry
作者:Vicente del Amo、Laura Siracusa、Theodoros Markidis、Beatriz Baragaña、Khadga M. Bhattarai、Marta Galobardes、Gregorio Naredo、M. Nieves Pérez-Payán、Anthony P. Davis
DOI:10.1039/b412298d
日期:——
monoprotection employing 1-(2-nitrobenzenesulfonyloxy)-benzotriazole 29. Regioselectivity of > or 50 : 1 is achieved, presumably reflecting an exceptional sensitivity to steric hindrance. Protection of the remaining amino group as Boc or Alloc gives the scaffolds in approximately 40% overall yield from cholic acid. Scaffold 13 has been sequentially deprotected and derivatised with N-carbamoyl amino acids, to give