TMSCl-Mediated Synthesis of α,β-Unsaturated Amides via C–C Bond Cleavage and C–N Bond Formation of Propargyl Alcohols with Trimethylsilyl Azide
作者:Xian-Rong Song、Bo Song、Yi-Feng Qiu、Ya-Ping Han、Zi-Hang Qiu、Xin-Hua Hao、Xue-Yuan Liu、Yong-Min Liang
DOI:10.1021/jo5013948
日期:2014.8.15
method with high efficiency for the synthesis of α,β-unsaturated amides from the easily prepared propargyl alcohols and TMSN3 using TMSCl as an acid promoter is developed. A wide variety of α,β-unsaturated amides were produced in moderate to excellent yields. Mechanistic studies indicate that this transformation involves TMSCl-mediated allenylazide intermediate formation, C–C bond cleavage, and C–N
开发了一种新的高效方法,该方法利用TMSC1作为酸促进剂,由易于制备的炔丙醇和TMSN 3合成α,β-不饱和酰胺。以中等至优异的产率制备了多种α,β-不饱和酰胺。机理研究表明,这种转化涉及TMSC1介导的烯丙基叠氮化物中间体的形成,CC键的裂解和CN键的形成。重要的是,该反应显示出良好的官能团相容性和高区域选择性,并且反应时间相对较短且试剂便宜。