Studies on Nitro Carboxylic Acids. II. Synthesis of α,β-Unsaturated β-Nitro Carboxylic Esters
作者:Chung-gi Shin、Yasuchika Yonezawa、Hirotoshi Narukawa、Katsumi Nanjo、Juji Yoshimura
DOI:10.1246/bcsj.45.3595
日期:1972.12
Synthetic studies on ethyl α,β-unsaturated β-nitrocarboxylates (IV) through two routes are described. Ethyl α-hydroxy-β-nitrocarboxylates (II) obtained by the reactions of ethyl α,β-unsaturated carboxylates with fuming nitric acid or by those of nitroparafins with ethyl glyoxylate, were treated with acetic anhydride to afford ethyl α,-acetoxy-β-nitrocarboxylates (III), which were subsequently converted
描述了通过两种途径对 α,β-不饱和 β-硝基羧酸乙酯 (IV) 进行的合成研究。α-羟基-β-硝基羧酸乙酯(II)由α,β-不饱和羧酸乙酯与发烟硝酸反应或硝基烷烃与乙醛酸乙酯反应得到,用乙酸酐处理,得到α,-乙酰氧基-β乙酯-硝基羧酸盐 (III),随后通过用作催化剂的碱处理将其转化为 IV。另一方面,IV 也可从α-氯-β-硝基羧酸乙酯中获得,α-氯-β-硝基羧酸乙酯来源于α,β-不饱和羧酸乙酯与硝基或亚硝酰氯的反应。IV的结构分配是基于元素分析、红外光谱及其转化为相应的α-甲氧基衍生物。