Synthesis of [18-C-6]-β3-(L)-DOPA, first β-amino acid with a crown-ether receptor side-chain
摘要:
Terminally protected Boc-beta(3)-(L)-DOPA-OMe has been synthesized from (L)-DOPA by the Arndt-Eistert homologation procedure. Then, a first crown-ether derivative, Boc-[18-C-6]-beta(3)-(L)-DOPA-OMe. has been obtained by bis-O-alkylation of the catechol function with cyclization, using Cs2CO3 as base and pentaethyleneglycol ditosylate as alkylating agent, in DMF at 60degreesC. (C) 2002 Elsevier Science Ltd. All rights reserved.
Synthesis of [18-C-6]-β3-(L)-DOPA, first β-amino acid with a crown-ether receptor side-chain
摘要:
Terminally protected Boc-beta(3)-(L)-DOPA-OMe has been synthesized from (L)-DOPA by the Arndt-Eistert homologation procedure. Then, a first crown-ether derivative, Boc-[18-C-6]-beta(3)-(L)-DOPA-OMe. has been obtained by bis-O-alkylation of the catechol function with cyclization, using Cs2CO3 as base and pentaethyleneglycol ditosylate as alkylating agent, in DMF at 60degreesC. (C) 2002 Elsevier Science Ltd. All rights reserved.