Condensed Heteroaromatic Ring Systems. XX. Palladium-Catalyzed Carbonylative Coupling of Iodobenzenes with (Z)-1-Ethoxy-2-(tributylstannyl)ethene.
作者:Takao SAKAMOTO、Akito YASUHARA、Yoshinori KONDO、Hiroshi YAMANAKA
DOI:10.1248/cpb.40.1137
日期:——
Palladium-catalyzed cross-coupling reaction of iodobenzene and its 4-substituted derivatives, except for 4-nitroiodobenzene, with (Z)-1-ethoxy-2-(tributylstannyl)ethene under a carbon monoxide atmosphere (5 atm) gave the corresponding (E)-3-ethoxy-1-arylprop-2-en-1-ones in considerable yields. Syntheses of chromone and 4(1H)-quinolinone were accomplished by application of this method to 2-(methoxymethoxy)iodobenzene and ethyl 2-iodophenylcarbanylate, respectively. The results obtained on the carbonylative coupling reaction of halopyridines are also described.
在碳氢化合物氛围(5个大气压)下,使用钯催化的偶联反应将碘苯及其4-取代衍生物(不包括4-硝基碘苯)与(Z)-1-乙氧基-2-(三丁基锡)乙烯反应,得到了相应的(E)-3-乙氧基-1-芳基丙-2-烯-1-酮,产率相当可观。通过将该方法应用于2-(美克锡基)碘苯和乙基2-碘苯基羧酸酯,分别合成了香豆素和4(1H)-喹啉酮。此外,还描述了卤吡啶的碳酰化耦合反应的结果。