The Pd- or Pd/Cu-catalyzed coupling reactions of halobenzenes bearing the methyl, hydroxymethyl, acetoxymethyl, methoxycarbonyl, or both methoxy and 4,4-dimethyl-4,5-dihydro-1,3-oxazol-2-yl groups in the ortho-position with gaseous or metallated acetylene, (trialkylsilyl)acetylenes, and arylacetylenes have been systematically studied. Various functionalized aryl- or diarylacetylenes have been synthesized in good to excellent yields. Whereas additional fluoro, nitro, or methoxy group attached to the benzene ring does not interfere in the coupling reactions, the presence of a methoxycarbonyl requires a careful optimization of reaction conditions to achieve moderate yields.
对含有甲基、羟甲基、乙酰氧甲基、甲氧羰基或甲氧和4,4-二甲基-4,5-二氢-1,3-噁唑-2-基基团的卤代苯在邻位与气态或金属化的乙炔、(三烷基硅基)乙炔和芳基乙炔的Pd-或Pd/Cu催化偶联反应已被系统研究。各种官能化的芳基或二芳基乙炔已被合成,产率良好至优异。在苯环上附加额外的氟、硝基或甲氧基不会干扰偶联反应,但甲氧羰基的存在需要仔细优化反应条件以获得中等产率。