Synthesis of Five- and Six-Membered Dihalogenated Heterocyclic Compounds by Electrophile-Triggered Cyclization
作者:Ke-Gong Ji、Hai-Tao Zhu、Fang Yang、Ali Shaukat、Xiao-Feng Xia、Yan-Fang Yang、Xue-Yuan Liu、Yong-Min Liang
DOI:10.1021/jo101085f
日期:2010.8.20
aryl, and heteroaryl moieties can be prepared in good to excellent yields (up to 99%) by allowing 1,4-butyne-diol, 4-aminobut-2-yn-1-ol, and pent-2-yne-1,5-diol derivatives to react with different electrophiles (I2, IBr, and ICl) at room temperature. Both halogen atoms generated from electrophiles were used effectively. The resulting halides can be further exploited by using palladium-catalyzed coupling
可以通过允许1,4-丁炔二醇,4-丁烯以高至极佳的收率(高达99%)制备带有烷基,乙烯基,芳基和杂芳基部分的高度取代的二卤代二氢呋喃,二氢吡咯和二氢-2 H-吡喃。氨基丁-2-炔-1-醇和戊-2-炔-1,5-二醇衍生物在室温下与不同的亲电试剂(I 2,IBr和ICl)反应。由亲电试剂产生的两个卤素原子均得到有效利用。所得的卤化物可通过使用钯催化的偶联反应来进一步开发。痕量水的存在对于该亲电环化是必不可少的。