A study of the Claisen—Eschenmoser reaction for hydroxymethylbenzofurans and-indoles
作者:T. I. Mukhanova、S. Yu. Kukushkin、P. Yu. Ivanov、L. M. Alekseeva、V. G. Granik
DOI:10.1007/s11172-007-0053-9
日期:2007.2
N,N-Dimethylacetamide dimethyl acetal reacted with 5(7)-substituted 2-(hydroxy-methyl)benzofurans to give N,N-dimethyl-2-(2-methylbenzofuran-3-yl)acetamides. Analogous reactions with 3-(hydroxymethyl)indole and 1-hydroxy-6-methyl-1,2,3,4-tetrahydro-carbazole afforded N,N-dimethyl-3-(3-indolyl)propionamide and N, N-dimethyl-2-(6-methyl-1,2,3,4-tetrahydrocarbazol-1-yl)acetamide, respectively.
An unprecedented C(sp2)−O scission enabled annulations of 2-vinylbenzofurans through a versatile C−H/C−O/N−Hfunctionalization cascade. This reaction was achieved using a peptide-isosteric triazole and an inexpensive, non-toxic iron catalyst.
Baclofen (beta-p-chlorophenyl GABA) is one of the selective agonists for the bicuculline-insensitive GABA(B) receptors. In the search for new compounds that bind to GABA(B) receptors it is very important to clarify the structural requirements. We report the syntheses of and binding studies on various S-heteroaromatic (benzo[b]furan and benzo[b]thiophen)aminobutyric acids. The 4-amino-3-(7-methyl-benzo[b]furan-2-yl)butanoic acid 8g is a potent and specific ligand for GABA(B) receptors, with an IC50 value of 5.4 mu M in the displacement of [H-3]GABA.
BENZAMIDE AND HETEROARENE DERIVATIVES AS CETP INHIBITORS