<i>N-</i>Morpholinomethyl-5-lithiotetrazole: A Reagent for the One-Pot Synthesis of 5-(1-Hydroxyalkyl)tetrazoles
作者:Panagiotis D. Alexakos、Duncan J. Wardrop
DOI:10.1021/acs.joc.9b01885
日期:2019.10.4
An efficient, one-pot method for the preparation of 5-(1-hydroxyalkyl)tetrazoles is reported. N-Morpholinomethyl-5-lithiotetrazole, generated by the deprotonation of 4-(N-tetrazolylmethyl)morpholine with LiHMDS, undergoes addition to ketones and aldehydes (both aromatic and aliphatic) to form 5-(1-hydroxyalkyl)tetrazoles in a high yield, after acidic workup. The reported protocol displays a broad substrate
报道了一种有效的一锅法制备5-(1-羟烷基)四唑的方法。通过LiHMDS将4-(N-四唑基甲基)吗啉去质子化而生成的N-Morpholinomethyl-5-lithiotetrazole可以与酮和醛(芳族和脂族)加成,以高产率形成5-(1-羟烷基)四唑,经过酸性处理后。报告的协议显示了广泛的底物范围和官能团耐受性,避免了使用基于氰化物或叠氮化物的试剂,并提供了空间拥挤和不饱和四唑的通道,这些通道很难通过其他方式获得。