Valuable Versatile Reactivity
of Thiaisatoic Anhydrides: Expedient SolidPhase Synthesis
of Thieno[1,4]diazepine-2,5-diones
作者:Vincent Lisowski、Yann Brouillette、Pascal Verdié、Jean Martinez
DOI:10.1055/s-2008-1078210
日期:——
An expedient route for the generation of substituted thieno[3,2-e][1,4]diazepine-2,5-dione analogues is described herein. It was demonstrated in solution that thiaisatoic anhydride and its N-alkylated equivalents react in opposite ways with amino acids in basic conditions. This versatile reactivity was used to develop an efficient strategy on solid support. Wang resin-bound thiaisatoic anhydride was coupled with N-alkylated α-amino acids, cyclo-condensed and effectively cleaved from the polymer to provide a preliminary collection of thieno[3,2-e][1,4]diazepine-2,5-diones in 83-99% purity and 71-95% yield.
本文描述了一种合成取代的噻吩并[3,2-e][1,4]二氮杂环庚烯-2,5-二酮类似物的便捷途径。在溶液中证明,硫代异硫氰酸酐及其N-烷基化类似物在碱性条件下与氨基酸发生相反的反应。利用这一多样的反应性,开发了一种高效的固相支持策略。Wang树脂结合的硫代异硫氰酸酐与N-烷基化的α-氨基酸反应,环化并有效地从聚合物中裂解,得到了纯度为83-99%、产率为71-95%的噻吩并[3,2-e][1,4]二氮杂环庚烯-2,5-二酮的初步集合。