Photocycloaddition of α,β-unsaturated-γ-lactam with ethylene. Synthesis of conformationally restricted glutamate analogs, l-2-(2-carboxycyclobutyl)glycines
作者:Hidekazu Tsujishima、Kuniko Nakatani、Keiko Shimamoto、Yasushi Shigeri、Noboru Yumoto、Yasufumi Ohfune
DOI:10.1016/s0040-4039(97)10807-3
日期:1998.3
Both (2S,1′S,2′S)- and (2S,1′S,2′R)-isomers of 2-(2-carboxycyclobutyl)glycine (CBG-I, 1b) and (CBG-III, 2b) are synthesized in a stereoselective manner via a [2+2] photocycloaddition of α,β-unsaturated-γ-lactam 3 with ethylene in acetone. The extended type of isomer 1b showed a weak activity on group II metabotropic glutamate receptors (mGluR2) of rat brain.
两(2小号,1'小号,2'小号) -和(2小号,1'小号,2' - [R 2-(2- carboxycyclobutyl)甘氨酸(CBG-1,) -异构体1B)和(CBG-III ,2b)通过α,β-不饱和-γ-内酰胺3与乙烯在丙酮中的[2 + 2]光环加成以立体选择的方式合成。异构体1b的扩展类型对大鼠脑的II型代谢型谷氨酸受体(mGluR2)具有弱活性。