A comparative study on the photo-induced arylation of β-dicarbonyl compounds by arylazosulfides and its use in the synthesis of methyl labeled 2-arylpropionic acids
作者:Mercè Tona、Francisco Sánchez-Baeza、Angel Messeguer
DOI:10.1016/s0040-4020(01)85294-7
日期:1994.1
corresponding arylation adducts in satisfactory yields. Concerning the β-dicarbonyl derivatives, condensation of acetylacetone in the case of 1 and of dimethyl malonate in that of 11 gave the best results. However, the further methylation of the aryl β-dicarbonyl adduct was clearly advantageous for the case of the 2-arylmalonate derivatives. The use of this synthetic strategy for the convenient preparation of
提出了一种通过光诱导分解芳基偶氮硫化物使β-二羰基衍生物(乙酰丙酮,乙酰乙酸甲酯和丙二酸二甲酯)芳基化的比较研究。所使用的芳基偶氮硫化物包含与酮洛芬或布洛芬有关的芳基部分,并且该反应按照Dell'Erba等人的报告的方法进行。(四面体,1991,47,333)。从所分析的芳基偶氮硫化物,仅那些带有与苯环连接的羰基的那些,即1和11,以令人满意的产率提供了相应的芳基化加合物。关于β-二羰基衍生物,在1的情况下乙酰丙酮的缩合。丙二酸二甲酯中11的结果最好。然而,对于2-芳基丙二酸酯衍生物的情况,芳基β-二羰基加合物的进一步甲基化显然是有利的。使用该合成策略方便地制备在C-2处的甲基标记的酮洛芬(23%的总产率,3-硝基二苯甲酮7步)和布洛芬(34%的总产率,4异丁酰苯8步)异位异构体也有报道。