The synthesis of deuterium-labeled N-nitrosodiethanolamine and N-nitroso-2-hydroxymorpholine
作者:Richard N. Loeppky、Heping Xiong
DOI:10.1002/jlcr.2580341114
日期:1994.11
Two deuterated derivatives of N-nitrosodiethanolamine and two deuterated derivatives of N-Nitroso-2-hydroxymorpholine were prepared. 1,1,1′,1′-2H4-N-Nitrosodiethanolamine 1a was prepared in 99% isotopic purity by simple base catalyzed H-D exchange. 2,2,2′,2′-2H4-N-Nitrosodiethanolamine 1b was synthesized in 98% isotopic purity by the LiAlD4 reduction of dimethyl iminodiethanoate, followed by acid catalyzed nitrosation. 5,5-2H2-N-Nitroso-2-hydroxymorpholine 2a was prepared in 99% isotopic purity through a series of steps involving 1) the selective base catalyzed H-D exchange of the CH2 adjacent to the ester function of 2,2-diethoxyethylcarboethoxymethylnitrosamine, 2) its reduction with diisobutylaluminum hydride at −8°C followed by 3) acid catalyzed hydrolysis of the acetal and cyclization to the hemiacetal. 2-2H-N-Nitroso-2-hydroxymorpholine 2b (98% isotopic purity) was prepared through the LiAlD4 reduction of 2-hydroxyethylcorboethoxymethylnitrosamine at −78°C.
制备了两份N-亚硝基二乙醇胺的氘代衍生物和两份N-亚硝基-2-羟基吗啉的氘代衍生物。1a 1,1,1',1'-2H4-N-亚硝基二乙醇胺以99%的同位素纯度通过简单的碱催化H-D交换反应制备得到。1b 2,2,2',2'-2H4-N-亚硝基二乙醇胺以98%的同位素纯度通过二甲基亚氨基二乙酸酯的LiAlD4还原反应合成,随后进行酸催化硝化反应。2a 5,5-2H2-N-亚硝基-2-羟基吗啉通过一系列步骤制备,包括1)选择性碱催化H-D交换反应,涉及酯功能团邻近的CH2基团的交换,2)在-8°C下使用二异丁基氢化铝还原,3)酸催化水解原酸酯和环化成半缩醛,最终得到99%的同位素纯度。2b 2-2H-N-亚硝基-2-羟基吗啉(98%同位素纯度)是通过在-78°C下使用LiAlD4还原2-羟乙基亚氨基二乙酸酯制备的。