N-Bromosuccinimide Initiated One-Pot Synthesis of Imidazoline
摘要:
A novel cationic Br initiated one-pot imidazoline synthesis has been developed using olefin, nitrile, amine, and N-bromosuccinimide. The olefinic substrates and the nitrile partners can be flexibly varied to achieve a range of imidazoline derivatives.
proceeds rapidly under mild conditions with high regioselectivity. Olefins react with TsNBr2 in moist THF to form δ-amino ether at roomtemperature. Treatment of TsNBr2 with olefin in MeCN at roomtemperature produced imidazoline in high yield. Further modification of the reaction condition resulted in the development of a one-step procedure for the synthesis of N-acetyl,N′-tosyl diamine derivatives directly
已经发现N,N-二溴-对甲苯磺酰胺(TsNBr 2)是用于各种氨基官能化反应的有效试剂。该试剂既可作为亲电子溴源,也可作为胺在不同条件下与烯烃反应,从而产生氨基醚,咪唑啉,二胺和氨基溴。该反应在温和条件下以高区域选择性快速进行。烯烃与TsNBr 2在潮湿的THF中反应,在室温下形成δ-氨基醚。在室温下,在MeCN中用烯烃处理TsNBr 2可以高产率生产咪唑啉。反应条件的进一步改变导致了一步合成步骤的发展。N-乙酰基,N'-甲苯磺酰基二胺衍生物直接来自烯烃。当烯烃与2.4摩尔当量TsNBr的处理2中K的存在2 CO 3,Ñ,Ñ在适中的产率获得'-ditosyl二胺衍生物。当在室温下在干燥的CH 2 Cl 2中用试剂处理烯烃时,观察到氨基溴的瞬时形成。
<i>N</i>-Bromosuccinimide Initiated One-Pot Synthesis of Imidazoline
A novel cationic Br initiated one-pot imidazoline synthesis has been developed using olefin, nitrile, amine, and N-bromosuccinimide. The olefinic substrates and the nitrile partners can be flexibly varied to achieve a range of imidazoline derivatives.