使用 KO t Bu/1,10-菲咯啉采用热或光化学控制工艺建立了多环芳香二芳基胺和咔唑的化学发散合成方法。合成过程涉及9-氨基-10-(氧膦基)菲的脱氧膦基化,这是通过区域选择性钯催化的氧膦基胺与2-碘联苯的直接[4 + 2]苯环化反应获得的。当在加热条件(~100℃)下进行脱氧膦化时,会产生9-氨基菲。然而,当反应在紫光(LED,λ max = 约 390 nm)照射下进行时,KO t Bu/1,10-菲咯啉促进单电子转移触发的脱氧膦化,然后环化,产生相应的π-膨胀咔唑。我们通过双脱氧膦环化成功合成了高度π扩容的二咔唑。此外,我们还介绍了通过脱膦酰化过程产生的一系列氨基化合物的光学性质。
使用 KO t Bu/1,10-菲咯啉采用热或光化学控制工艺建立了多环芳香二芳基胺和咔唑的化学发散合成方法。合成过程涉及9-氨基-10-(氧膦基)菲的脱氧膦基化,这是通过区域选择性钯催化的氧膦基胺与2-碘联苯的直接[4 + 2]苯环化反应获得的。当在加热条件(~100℃)下进行脱氧膦化时,会产生9-氨基菲。然而,当反应在紫光(LED,λ max = 约 390 nm)照射下进行时,KO t Bu/1,10-菲咯啉促进单电子转移触发的脱氧膦化,然后环化,产生相应的π-膨胀咔唑。我们通过双脱氧膦环化成功合成了高度π扩容的二咔唑。此外,我们还介绍了通过脱膦酰化过程产生的一系列氨基化合物的光学性质。
Benziodoxole Triflate as a Versatile Reagent for Iodo(III)cyclization of Alkynes
作者:Bin Wu、Junliang Wu、Naohiko Yoshikai
DOI:10.1002/asia.201701530
日期:2017.12.14
Hyperactive: A benziodoxole triflate promotes iodo(III)cyclization of alkynes tethered to a variety of nucleophilic moieties, affording benziodoxole-appended (hetero)arenes such as benzofurans, benzothiophenes, isocoumarins, indoles, and polyaromatics. These unprecedented (hetero)aryl-IIII compounds are easy to purify, air- and thermally stable, and amenable to various synthetic transformations.
General Method for Functionalized Polyaryl Synthesis via Aryne Intermediates
作者:Thanh Truong、Milad Mesgar、Ky Khac Anh Le、Olafs Daugulis
DOI:10.1021/ja504886x
日期:2014.6.18
complements transition-metal-catalyzed direct arylation and allows access to structures that are not easily accessible via other direct arylation methods. The reactions are highly functional-group tolerant, with alkene, ether, dimethylamino, trifluoromethyl, ester, cyano, halide, hydroxyl, and silyl functionalities compatible with reaction conditions.
Versatile telluracycle synthesis via the sequential electrophilic telluration of C(sp<sup>2</sup>)–Zn and C(sp<sup>2</sup>)–H bonds
作者:Bin Wu、Melvina Melvina、Xiangyang Wu、Edwin Kok Lee Yeow、Naohiko Yoshikai
DOI:10.1039/c7sc01162h
日期:——
We report herein a new approach for the synthesis of tellurium-bridged aromatic compounds based on the sequential electrophilic telluration of C(sp2)–Zn and C(sp2)–Hbonds with tellurium(IV) chlorides. A combination of transition metal-catalyzed (migratory) arylmetalation of alkynes and sequential telluration allows for the expedient construction of a library of functionalized benzo[b]tellurophenes
我们在此报告了一种新的合成碲桥接芳族化合物的新方法,该方法基于C(sp 2)-Zn和C(sp 2)-H键与碲(IV)氯化物的顺序亲电碲化。炔烃的过渡金属催化(迁移)芳基金属化和连续碲化相结合,可以方便地构建功能化的苯并[ b ]碲二苯酚文库。此外,可以容易地从相应的2-碘杂双联芳基合成各种杂芳基稠合的苯并二氮杂苯并与其他新颖的碲嵌入的多环芳族化合物。
Transition‐Metal‐Free Heterobiaryl Synthesis via Aryne Coupling
作者:Tarak Saied、Catherine Demangeat、Armen Panossian、Frédéric R. Leroux、Yves Fort、Corinne Comoy
DOI:10.1002/ejoc.201900130
日期:2019.9
efficient route for the construction of various heterobiaryl backbones in fair to excellent yields using the Aryne coupling methodology. This study outlined the remarkable effect of external chelating ligands and salt additives on the heterocyclic partner reactivity in the aryne coupling reaction.