Solid-Phase Traceless Synthesis of Selected Nitrogen-Containing Heterocyclic Compounds. The Encore Technique for Directed Sorting of Modular Solid Support
A solid phase traceless synthesis of 2-arylaminobenzimidazoles
作者:Viktor Krchňák、Jennifer Smith、Josef Vágner
DOI:10.1016/s0040-4039(00)02349-2
日期:2001.2
A solid phase traceless synthesis of 2-arylaminobenzimidazoles in three combinatorial steps is reported that is based on acid lability of N-benzylanilines. MBHA resin was reacted with o-nitrobenzenes, the nitro group was reduced by tin(II) chloride, the resin-bound o-phenylene diamine was treated with isothiocyanates, and the resulting thiourea cyclized by carbodiimide. 2-Arylaminobenzimidazoles were further derivatized with alkyl halides. Target compounds were cleaved from the solid support by TFA or gaseous HF. (C) 2001 Elsevier Science Ltd. AII rights reserved.