Facile Synthesis of 3-Methylbenzene Oxide and 1-Methylbenzene Oxide, and 1H-NMR Data for Diels-Alder Adducts of Three Methylbenzene Oxides with 4-Phenyl-1,2,4-triazoline-3,5-dione.
作者:Kazuhiro NOJIMA、Chiho ISOGAMI、Masaaki HIROBE
DOI:10.1248/cpb.41.2106
日期:——
Diels-Alder reaction of methyl-substituted 1, 3-butadienes (1) with 1, 2-dibromoethylene gave dibromomethylcyclo-hexenes (2), which were subjected to epoxidation, followed by dehydrobromination of the resultant dibromo oxides (3) to afford 3-methylbenzene oxide (4a) and 1-methylbenzene oxide (4b). However, 4-methylbenzene oxide (4c) could not be obtained in this way.
甲基取代的1,3-丁二烯(1)与1,2-二溴乙烯的Diels-Alder反应生成二溴甲基环己烯(2),然后对生成的二溴氧化物(3)进行环氧化,再进行去溴化反应,得到3-甲基苯氧化物(4a)和1-甲基苯氧化物(4b)。然而,无法通过这种方法获得4-甲基苯氧化物(4c)。