作者:Alex F. C. Flores、Luciana A. Piovesan、Lucas Pizzuti、Darlene C. Flores、Juliana L. Malavolta、Marcos A. P. Martins
DOI:10.1002/jhet.1774
日期:2014.5
3‐(trihalomethylated‐1,2‐azol‐3‐yl)propanoate is reported. Preparation of the key methyl 7,7,7‐trihalo‐4‐methoxy‐6‐oxohept‐4‐enoate precursors from levulinic acid is also described. The synthetic potential of this synthetic protocol was indicated by the production of several methyl and ethyl 3‐(isoxazol‐3‐yl)propanoates and 3‐(1H‐pyrazol‐3‐yl)propanoates, and the respective acid derivatives, in good (70–95%)
将7,7,7-三氟-4-甲氧基-6-氧代-4-庚烯酸甲酯和7,7,7-三氯-4-甲氧基-6-氧代-4-庚烯酸甲酯高效杂环化为异恶唑和吡唑衍生物代表报告了一种新型的谷氨酸样3-(三卤代甲基化1,2-氮杂-3-基)丙酸酯。还描述了从乙酰丙酸制备关键的7,7,7-三卤代-4-甲氧基-6-氧杂庚酸酯-甲基丙烯酸甲酯前体。这种合成规程的合成潜力通过生产3-(异恶唑-3-基)丙酸甲酯和乙酯和3-(1H-吡唑-3-基)丙酸酯和相应的酸衍生物来表明。 (70–95%)的产量。5-(3-乙氧基-3-氧丙基)-1 H-吡唑-3-羧酸乙酯的晶体结构(10c)是通过单晶X射线衍射分析确定的。N–H … H分子间氢键将分子连接到分解异构体中。