U.S. Department of Agriculture, Agricultural Research Service, Insect Chemical Ecology Laboratory, 20705, Beltsville, Maryland.
J Chem Ecol. 1993 Dec;19(12):2935-46. doi: 10.1007/BF00980593.
A general synthetic approach to various catechol derivatives was developed using a copper-catalyzed cross-coupling reaction of 1,2-dimethoxy-4-brornomethyl, 1-ethoxy-2-methoxy-4-bromomethyl- and 2-ethoxy-1-methoxy-4-bromomethylbenzenes with Grignard reagents. Dilithium tetrachlorocuprate was an acceptable catalyst in the dimethoxy series, whereas copper(I) iodide in THF-HMPA was a superior catalyst in all cases due to decreased side reactions, i.e., reduction and reductive coupling. Methyl-substituted analogs of methyl eugenol, a potent attractant of Oriental fruit fly,Dacus dorsalis Hendel, were synthesized by this method and evaluated for attractancy in field tests.
开发了一种通用的合成方法,可用于各种儿茶酚衍生物,方法是使用铜催化的 1,2-二甲氧基-4-溴甲基、1-乙氧基-2-甲氧基-4-溴甲基和 2-乙氧基-1-甲氧基-4-溴甲基苯与格氏试剂的交叉偶联反应。二锂四氯铜是二甲氧基系列中可接受的催化剂,而在所有情况下,四氢呋喃-HMPA 中的碘化亚铜都是更好的催化剂,因为减少了副反应,即还原和还原偶联。通过这种方法合成了甲基丁香酚的甲基取代类似物,甲基丁香酚是东方果实蝇(Dacus dorsalis Hendel)的一种有效的引诱剂,并在田间试验中评估了其引诱活性。