作者:Aurélie Falcou、Claude Boullais
DOI:10.1002/(sici)1099-1344(199807)41:7<657::aid-jlcr110>3.0.co;2-e
日期:1998.7
CH 3 I to afford diethyl 2-methyl [2,3- 13 C 2 ] succinate which by acid hydrolysis gave the corresponding labelled acid. Treatment of the latter with SOCl 2 provided 2-methyl [2,3- 13 C 2 ] succinic anhydride. This anhydride upon treatment with Et 3 N, ZnCl 2 and trimethylchlorosilane in acetonitrile afforded 2,5-bis (trimethylsilyloxy)-3-methyl [3,4 13 C 2 ] furan which was subjected to a Diels Alder
[2,3- 13 C 2 ]琥珀酸二乙酯是在CuBr 2 存在下通过乙基硫代[2-13 C]乙酸酯氧化二聚反应制备的。其二烯醇化物用二异丙基氨基锂(LDA)生成并用CH 3 I甲基化以提供2-甲基[2,3-13 C 2 ]琥珀酸二乙酯,其通过酸水解得到相应的标记酸。后者用SOCl 2 处理提供2-甲基[2,3-13 C 2 ]琥珀酸酐。该酸酐在乙腈中用 Et 3 N、ZnCl 2 和三甲基氯硅烷处理后得到 2,5-双(三甲基甲硅烷氧基)-3-甲基 [3,4 13 C 2 ] 呋喃,其与三氯乙烯进行 Diels Alder 反应,产生2,3-二氯-5-甲基[5,6- 13 C 2 ] 1,4-苯醌,其依次通过已知程序转化为[2,3- 13 C 2 -2,5-环己二烯基] 3.泛醌