Plant coumarins: XI. Cross coupling reactions with 2-(tosyl)oreoselone
作者:A. B. Lipeeva、E. E. Shul’ts、M. M. Shakirov、G. A. Tolstikov
DOI:10.1134/s107042801301017x
日期:2013.1
p-toluenesulfonyl chloride gave 2-tosyloreoselone which showed a high reactivity in palladium-catalyzed cross-coupling reactions with formation of a new carbon-carbon bond. 2-Tosyloreoselone reacted with terminal alkynes in the presence of Pd(PPh3)2Cl2 to give the corresponding 2-alkynylfuro[3,2-g]chromen-3-ones. 2-Aryl(hetaryl)alkynyloreoselones were obtained in high yield directly by palladium-catalyzed reaction
线性稠合的呋喃香豆素,oreoselone与对甲苯磺酰氯的反应产生了2-甲苯磺酰基酮,其在钯催化的交叉偶联反应中显示出高反应性并形成了新的碳-碳键。2-Tosyloreoselone在Pd(PPh 3)2 Cl 2存在下与末端炔烃反应,生成相应的2-炔基呋喃[3,2- g] chromen-3-ones。直接通过钯催化的异黄酮与甲苯磺酰氯和芳基(杂芳基)乙炔的高产率直接获得2-芳基(杂芳基)炔基烯酮。在具有单和二齿配体,四丁基溴化铵和碱的钯络合物的存在下,2-甲苯磺基松香酮与芳基(杂芳基)硼酸反应,得到2-芳基(杂芳基)取代的oreoselones。由2-甲苯基松香酮和三氟(乙烯基)硼酸钾合成2-乙烯基松香酮。