Asymmetric Diels–Alder reactions of 2-fluoroacrylic acid derivatives. Part 2: A remarkable effect of fluorine substituent on the diastereoselectivity
作者:Hisanaka Ito、Akio Saito、Takeo Taguchi
DOI:10.1016/s0957-4166(98)00196-7
日期:1998.6
efficient construction of a chiral monofluorinated tertiary carbon was achieved by a highly exo- and diastereofacial selective Diels–Alder reaction of a 2-fluoroacrylic acid derivative derived from 8-phenylmenthol, and cyclopentadiene. The substituent effect of the fluorine on the selectivities is remarkable as compared with the other substituents at the α-position of the acrylate.
Synthesis of 2-fluoro analog of 6-aminonorbomane-2,6-dicarboxylic acid, a conformationally restricted analog of glutamic acid, in optically pure form is described.