A New Method for the Preparation of (E)-2-(Styrylsulfonyl)acetic Acid Esters and Their Reactions with Hydrazine Hydrate
作者:Norton Peet、Son Nguyen
DOI:10.1055/s-0030-1259974
日期:2011.4
A new route to esters of (E)-2-(styrylsulfonyl)acetic acid has been developed. Treatment of the methyl ester with hydrazine hydrate gave the six-membered 4-amino-5-phenylthiomorpholine-3-one 1,1-dioxide (1), and not the seven-membered 6-phenyl-1,4,5-thiadiazepane-3-one 1,1-dioxide (2) as previously described by others. In contrast, treatment of the ethyl ester with the same reagent provided a separable
已经开发出一种新的(E)-2-(苯乙烯基磺酰基)乙酸酯的途径。用水合肼处理甲酯得到六元4-氨基-5-苯基硫代吗啉-3-一1,1-二氧化物(1),而不是七元6-苯基-1,4,5-噻二氮烷-3-一个1,1-二氧化物(2),如前所述。相反,用相同的试剂处理乙酯提供了1和2的可分离的1:1.2混合物。1和2的NMR谱图与先前报告中针对2的谱图有很大不同。 环化-砜-杂环-酯