通过氯甲酸叔戊酯 (I) 的直接肼解,以令人满意的收率合成了氨基甲酸叔戊酯 (II)。试剂 I 是通过改进的方法制备的,使用光气在甲苯中的储备溶液。试剂II转化为叠氮基甲酸叔戊酯(III),与叔丁基衍生物的情况一样,试剂III用于将叔戊基氧羰基(AOC)基团引入游离氨基酸、氨基酸酯和肽中. 通过本方法合成了多种新的AOC-氨基酸。发现氯仿会抑制试剂 III 与氨基酸酯的反应。本文描述了一种获得大量无水肼的实用且安全的方法。
<i>t</i>-Amyloxycarbonyl as a New Protecting Group in Peptide Synthesis. I. The Synthesis and Properties of<i>N</i>-<i>t</i>-Amyloxycarbonylamino Acids and Related Compounds
that the t-amyloxycarbonyl group (AOC group) can be introduced quite readily into amino acid esters by using t-amyl chloroformate as a reagent, and that the AOC group can be cleaved as smoothly as the t-butoxycarbonyl group (BOC group) under acidic conditions. Since this reagent is much easier to prepare than any other reagents used for the introduction of the BOC group, the new procedure is considered
t-amyl chloroformate (I). Reagent I was prepared by an improved method, using a stock solution of phosgene in toluene. Reagent II was converted to t-amyl azidoformate (III), as in the case of the t-butyl derivative, and reagent III was used for introducing the t-amyloxycarbonyl (AOC) group into free aminoacids, aminoacid esters, and peptides. Various new AOC-amino acids were synthesized by the present
通过氯甲酸叔戊酯 (I) 的直接肼解,以令人满意的收率合成了氨基甲酸叔戊酯 (II)。试剂 I 是通过改进的方法制备的,使用光气在甲苯中的储备溶液。试剂II转化为叠氮基甲酸叔戊酯(III),与叔丁基衍生物的情况一样,试剂III用于将叔戊基氧羰基(AOC)基团引入游离氨基酸、氨基酸酯和肽中. 通过本方法合成了多种新的AOC-氨基酸。发现氯仿会抑制试剂 III 与氨基酸酯的反应。本文描述了一种获得大量无水肼的实用且安全的方法。
Use of papain in resolving racemic N-(alkoxycarbonyl)glycines and N-(alkoxycarbonyl)alanines that contain small alkoxy groups
作者:John Leo Abernethy、Richard Bobeck、Antonio Ledesma、Rex Kemp