Synthesis of carbamate-type caged derivatives of a novel glutamate transporter blocker
作者:Kiyo Takaoka、Yoshiro Tatsu、Noboru Yumoto、Terumi Nakajima、Keiko Shimamoto
DOI:10.1016/j.bmc.2004.04.011
日期:2004.7
L-threa-beta-Benzyloxyaspartate (L-TBOA) and (2S,3S)-3-3-[4-(trifluoromethyl)benzoylamino]benzyloxy}aspartate (L-TFB-TBOA) are potent nontransportable blockers for glutamate transporters. We synthesized a carbamate-type coumarin derivative of L-TBOA 3a as a caged blocker and compared 3a with the corresponding ester-type analogs 1. The carbamate 3a was less sensitive to photolysis than the ester I but was more stable in the aqueous solution. The [6,7-bis(carboxymethoxy)-coumarin-4yl]methylcarbonyl (BCMCMC) group exhibited good results both in photoreactivity and stability. Therefore, we examined photolysis of N-BCMCMC-TBOA 3b and N-BCMCMC-TFB-TBOA 4, which immediately released blockers to show glutamate uptake inhibition. (C) 2004 Elsevier Ltd. All rights reserved.