Synthesis of Novel 4(5)-(5-Aminotetrahydropyran-2-yl)imidazole Derivatives and Their in Vivo Release of Neuronal Histamine Measured by Brain Microdialysis
作者:Shinya Harusawa、Makoto Kawamura、Lisa Araki、Ryusuke Taniguchi、Hiroki Yoneyama、Yasuhiko Sakamoto、Noritsugu Kaneko、Yumi Nakao、Kouta Hatano、Takeshi Fujita、Ryoko Yamamoto、Takushi Kurihara、Atsushi Yamatodani
DOI:10.1248/cpb.55.1245
日期:——
and (2S,5S)-cis-stereoisomers 1a and 1b of 4(5)-(5-aminotetrahydropyran-2-yl)imidazole, which have two chiral centers and adopt a stable chair conformation, were synthesized via cyclization of diol intermediates 7 using L-glutamine as the starting material. Their enantiomers, (2S,5R)-trans-1c and (2R,5R)-cis-1d, were synthesized by the same methodology from D-glutamine. Stereo isomers 1a-d were converted
4(5)-(5-氨基四氢吡喃-2-基)咪唑的(2R,5S)-反式和(2S,5S)-顺式立体异构体1a和1b,具有两个手性中心并采用稳定的椅构型通过使用L-谷氨酰胺作为起始原料,通过二醇中间体7的环化来合成α,β。它们的对映异构体(2S,5R)-trans-1c和(2R,5R)-cis-1d是通过相同的方法由D-谷氨酰胺合成的。将立体异构体1a-d分别转化为氰基胍11a-d和N-异丙基和N-3,3-二甲基丁基衍生物12a-d和13a-d。衍生物体内脑微透析的结果显然表明只有(2S,5R)异构体会增加神经元组胺的释放。在许多(2S,5R)-N-烷基衍生物中,13c(OUP-133)和18(OUP-153)将组胺释放分别提高至基础水平的180-190%和180-200%,