Under Mitsunobu conditions N-Boc-2-(hydroxymethyl)piperidine acts as a source of tert-butyl residue for the
conversion of phenols into aryl tert-butyl ethers under neutral conditions. This reactivity can be attributed to a neighboring
group contribution which strongly depends on the structure of the employed N-Boc-aminoalcohol. Five other, closely
related N-Boc-aminoalcohols investigated here did not show this special reactivity, and gave the regular Mitsunobu coupling
products.
在三苯膦/偶氮二
羧酸二
乙酯(Mitsunobu)条件下,N-Boc-2-(羟甲基)
哌啶作为叔丁基残基的来源,在中性条件下将
酚转化为苯基叔
丁基醚。这种反应性可以归因于相邻基团的影响,该影响强烈依赖于所用N-Boc
氨基醇的结构。本研究中调查的另外五种与之密切相关的N-Boc
氨基醇并未展现出这种特殊反应性,而是生成了常规的Mitsunobu偶联产物。