Deprotection of t-Butyl Esters of Amino Acid Derivatives by Nitric Acid in Dichloromethane
作者:Paolo Strazzolini、Massimo Scuccato、Angelo G Giumanini
DOI:10.1016/s0040-4020(00)00280-5
日期:2000.5
selected N-Z-derivatives of natural amino acid esters was investigated. The method was found to work effectively with alanine, phenylalanine, serine and the dipeptide aspartame, but the reagent brought about a number of unwanted transformations with tyrosine, methionine and tryptophan. Suitable protection of functions present in the latter ones allowed selective ester dealkylation, but tyrosine underwent
的去保护方法的延伸吨使用HNO -butylated羧基官能3在CH 2氯2到多个适当选择的Ñ的天然氨基酸酯-Z-衍生物进行了研究。发现该方法可与丙氨酸,苯丙氨酸,丝氨酸和二肽阿斯巴甜一起有效地工作,但是该试剂带来了许多不需要的酪氨酸,蛋氨酸和色氨酸转化。对后者中存在的官能团的适当保护允许选择性酯脱烷基,但是酪氨酸不可避免地需要进行快速的初步环硝化。