Furfuryl Cation Induced Cascade Formal [3 + 2] Cycloaddition/Double Ring-Opening/Chlorination: An Approach to Chlorine-Containing Complex Triazoles
作者:Jiawei Guo、Xiaoming Xu、Qingzhao Xing、Ziwei Gao、Jing Gou、Binxun Yu
DOI:10.1021/acs.orglett.8b03121
日期:2018.12.7
A TiCl4-promoted cascade formal [3 + 2] cycloaddition/double ring-opening/chlorination of 2-furylcyclobutanols with alkyl or aryl azides is described. This highly efficient transformation involves the formation/cleavage of several C–N, C–Cl, C–C, and C–O bonds in a single operation. It enables the quick construction of trisubstituted 1,2,3-triazoles with an (E)-enone moiety and a 3-chloropropyl unit
描述了TiCl 4促进的2-呋喃基环丁醇与烷基或芳基叠氮化物的级联式[3 + 2]级联甲醛加成/双开环/氯化反应。这种高效的转化涉及在一次操作中形成/裂解多个C–N,C–Cl,CC和C–O键。它能够快速构建具有(E)-烯酮部分和3-氯丙基单元的三取代1,2,3-三唑。氯化产物易于转化为其他结构多样的类似物。