作者:Hervé Geneste、Manfred Hesse
DOI:10.1016/s0040-4020(98)01014-x
日期:1998.12
Five C-13-dilabeled constitution isomers of 4-coumaroylspermidines were prepared in nine to eleven steps: N-1,4-di[(E)-4-coumaroyl]-(5,8-C-13(2))spermidine (13b), N-1-[(E)-4-coumaroyl]-(5,8-C-13(2))spermidine (17b), N-1,8-di[(E)-4-coumaroyl]-(1,4-C-13(2))spermidine (20b), N-4-[(E)-4-coumaroyl]-(1,4-C-13(2))spermidine (24b) and N-1,4,8-tri[(E)-4-coumaroyl]-(5,8-C-13(2))spermidine (26). The two C-13-atoms were subsequently introduced using labeled potassium cyanide. The synthesis proceeds through stepwise construction of the polyamine backbone including protection and deprotection steps of the amino functions. Based on H-1-H-1 NOE interactions, the preliminary study of their binding reveals that 20b binds to tRNA in the. same way as spermidine does, whereas 24b and 26 do not-show any NOE effects with the tRNA protons. (C) 1998 Elsevier Science Ltd. All rights reserved.