An Efficient Synthesis of 3-Substituted 3H-Pyrimidin-4-ones
摘要:
[GRAPHICS]A novel and practical synthesis of 3-substituted 3H-pyrimidin-4-ones is described. The key step involves the cyclization of enamide esters, derived from readily available beta-keto esters, with trimethylaluminum and various primary amines.
Veronese, A. C.; Gandolfi, V.; Basato, M., Journal of Chemical Research, Miniprint, 1988, # 8, p. 1843 - 1870
作者:Veronese, A. C.、Gandolfi, V.、Basato, M.、Corain, B.
DOI:——
日期:——
Enantioselective synthesis of β-amino acids based on BINAP—ruthenium(II) catalyzed hydrogenation
作者:William D. Lubell、Masato Kitamura、Ryoji Noyori
DOI:10.1016/s0957-4166(00)86107-8
日期:1991.1
BINAP-Ru(II) catalyzed hydrogenation of beta-substituted (E)-beta-(acylamino)acrylic acids allows efficient enantioselective synthesis of beta-amino acids. The Z double bond isomers which possess an intramolecular hydrogen bond between amide and ester groups are more reactive but are hydrogenated with poor enantioselectivity. BINAP-Rh(I) complexes afford only moderate stereoselectivity with the opposite sense of enantioselection.