This invention aims at providing a catalyst for producing an optically active aldehyde or an optically active ketone, which is an optically active carbonyl compound, by carrying out selective asymmetric hydrogenation of an α,β-unsaturated carbonyl compound, particularly a catalyst which is insoluble in a reaction mixture for obtaining optically active citronellal which is useful as a flavor or fragrance, by carrying out selective asymmetric hydrogenation of citral, geranial or neral; and a method for producing a corresponding optically active carbonyl compound. The invention relates to a catalyst for asymmetric hydrogenation of an α,β-unsaturated carbonyl compound, which comprises a powder of at least one metal selected from metals belonging to Group 8 to Group 10 of the Periodic Table, or a metal-supported substance in which at least one metal selected from metals belonging to Group 8 to Group 10 of the Periodic Table is supported on a support, an optically active cyclic nitrogen-containing compound and an acid.
2-Aminomethyl piperidines as novel urotensin-II receptor antagonists
作者:Jian Jin、Yonghui Wang、Feng Wang、Dongchuan Shi、Karl F. Erhard、Zining Wu、Brian F. Guida、Sarah K. Lawrence、David J. Behm、Jyoti Disa、Kalindi S. Vaidya、Christopher Evans、Lynette J. McMillan、Ralph A. Rivero、Michael J. Neeb、Stephen A. Douglas
DOI:10.1016/j.bmcl.2008.03.078
日期:2008.5
A series of 2-aminomethyl piperidines has been discovered as novel urotensin-IIreceptorantagonists. The synthesis, initial structure-activity relationships, and optimization of the initial hit that resulted in the identification of potent, cross-species active, and functional urotensin-IIreceptorantagonists such as 1a and 11a are described.