我们在此报告了在无溶剂研磨条件下机械化学 Cu 催化的 [3+2] 氮鎓-N-亚胺与腈的环加成反应。以 51-80% 的收率获得了各种 1,2,4-三唑衍生物。开发的协议在官能团兼容性、可扩展性、不使用溶剂、反应时间更短以及无需外部加热等方面具有优势。此外,杂环N-亚胺如喹啉鎓和异喹啉鎓盐也是合适的底物,从而产生1,2,4-三唑并[1,5- a ]喹啉和1,2,4-三唑并[5,1 - a ] 异喹啉衍生物在机械化学条件下。
Practical and Asymmetric Reductive Coupling of Isoquinolines Templated by Chiral Diborons
作者:Dongping Chen、Guangqing Xu、Qinghai Zhou、Lung Wa Chung、Wenjun Tang
DOI:10.1021/jacs.7b04256
日期:2017.7.26
We herein describe a chiral diboron-templated highly diastereoselective and enantioselective reductive coupling of isoquinolines that provided expedited access to a series of chiral substituted bisisoquinolines in good yields and excellent ee’s under mild conditions. The method enjoys a broad substrate scope and good functional group compatibility. Mechanistic investigation suggests the reaction proceeds
Electrochemical regioselective selenylation/oxidation of <i>N</i>-alkylisoquinolinium salts <i>via</i> double C(sp<sup>2</sup>)–H bond functionalization
作者:Xiang Liu、Yajun Wang、Dan Song、Yuhan Wang、Hua Cao
DOI:10.1039/d0cc06778d
日期:——
An efficient, novel, and environmentally friendly electrochemical regioselective selenylation/oxidation of N-alkylisoquinolinium salts via double C(sp2)–H bond functionalization under undivided electrolytic conditions has been developed. A series of selenide isoquinolones were easily accessed through this sustainable and clean electrochemical system. The present protocol was further extended to afford
已开发了在不分开的电解条件下通过双C(sp 2)-H键官能化对N-烷基异喹啉鎓盐进行高效,新颖且环境友好的电化学区域选择性硒化/氧化的方法。通过这种可持续,清洁的电化学系统,很容易获得一系列硒化异喹诺酮。本方案进一步扩展为提供硒化物喹诺酮和1,3-二甲基-1 H-苯并[ d ]咪唑-2(3 H)-1。此外,抗病毒生物测定法表明化合物3j对烟草花叶病毒(TMV)表现出优异的抗病毒活性,其抑制率高达90%。
Transition metal-free annulative vinylene transfer <i>via</i> the 1,3-dipolar reaction of <i>N</i>-ylides: access to benzo-fused indolizines
作者:Limin Zhao、Wen Li、Jiali Liu、Linying Ni、Zhihao Liu、Hao Shen、Hua Cao、Xiang Liu
DOI:10.1039/d2ob01846b
日期:——
efficient metal-free annulative vinylene transfer protocol for the synthesis of benzo-fused indolizines via 1,3-dipolar cycloadditions of N-ylides with vinylene carbonate has been developed. Vinylene carbonate serves as an acetylene surrogate without any external oxidant involved. This transformation leads to the direct construction of versatile benzo-fused indolizine derivatives in moderate to good yields