A New, Easy Access to the 6-Aminoperhydro-1,4-diazepine Scaffold under Ultrasound and Microwave Irradiation
作者:Giancarlo Cravotto、Alessandro Barge、Silvia Füzerová、Dharita Upadhyaya、Davide Garella、Silvio Aime、Lorenzo Tei
DOI:10.1055/s-2008-1067035
日期:——
A novel, efficient, and rapid synthesis of the 6-amino-perhydro-1,4-diazepine scaffold is reported. It was promoted by microwave or sequential ultrasound/microwave irradiation under solvent-free conditions or in solution. Protected ethylenediamine derivatives and N-Boc-serinol dimesylate underwent rapid cyclization to give 6-aminoperhydro-1,4-diazepine derivatives in excellent yields and with high
报道了一种新型、高效、快速合成 6-氨基-perhydro-1,4-二氮杂卓支架的方法。在无溶剂条件下或在溶液中通过微波或连续超声/微波照射来促进它。受保护的乙二胺衍生物和 N-Boc-丝氨醇二甲磺酸酯经历快速环化,以优异的收率和高选择性得到 6-氨基过氢-1,4-二氮杂卓衍生物,而在常规加热下相同的反应失败或收率可忽略不计。铯或钾离子通过配位磺酰胺基团催化闭环。迄今为止,文献中报道的所有相关工作主要关注 1 H-四氢-1,4-二氮杂-2,5-二酮或取代的 1,4-苯二氮杂的合成,而少数已发表的制备 6 -氨基过氢-1,4-二氮杂卓涉及多个步骤,需要较长的反应时间且产率较低。通过本方法,获得 6-氨基过氢-1,4-二氮杂卓变得更加容易和快捷。