A New Chiral Synthesis of Wieland-Miescher Ketone Catalyzed by a Combination of (S)-N-Benzyl-N-(2-pyrrolidinylmethyl)amine Derivative and Brønsted Acid
作者:Kohei Inomata、Yuichi Akahane、Yasuyuki Endo
DOI:10.3987/com-08-s(f)86
日期:——
New or known N-benzyl-N-(2-pyrrolidinylmethyl)amine derivatives bearing a variety of substituents on the aromatic ring were easily prepared from N-Boc-proline or N-Boc-prolinol. The enantioselectivity of the intramolecular asymmetric aldol reaction mediated by a combination of the amine derivative and Bronsted acid to prepare Wieland-Miescher ketone was examined in detail. During the examination, remarkable substitutional effects on the aromatic ring were observed. Development of a catalytic version of the reaction was successfully achieved by the use of N-[(9-anthracenyl)methyl]-N-(2-pyrrolidinylmethyl)amine in the presence of dichloroacetic acid.
Synthesis and Serotonergic Activity of 3-[2-(Pyrrolidin-1-yl)ethyl]indoles: Potent Agonists for the h5-HT<sub>1D</sub> Receptor with High Selectivity over the h5-HT<sub>1B</sub> Receptor
作者:Francine Sternfeld、Alexander R. Guiblin、Richard A. Jelley、Victor G. Matassa、Austin J. Reeve、Peter A. Hunt、Margaret S. Beer、Anne Heald、Josephine A. Stanton、Bindi Sohal、Alan P. Watt、Leslie J. Street
DOI:10.1021/jm9805687
日期:1999.2.1
The design, synthesis, and biological evaluation of a novel series of 3-[2-(pyrrolidin-1-yl)ethyl]indoles with excellent selectivity for h5-HT1D (formerly 5-HT1Dalpha) receptors over h5-HT1B (formerly 5-HT1Dbeta) receptors are described. Clinically effective antimigraine drugs such as Sumatriptan show little selectivity between h5-HT1D and h5-HT1B receptors. The differential expression of h5-HT1D and