The reaction of acetophenone hydrazones with TeCl4 in the presence of DBU gave a mixture of divinyl ditellurides and divinyl tellurides, which easily reacted with Cu powder in refluxing toluene to afford divinyl tellurides in good yields. The reaction of divinyl tellurides with bromine (1.2 eq.) gave the corresponding tellurium dibromide rather than the addition of the double bond whereas 3 molar amount
An efficient synthesis of isoquinolines via rhodium-catalyzed direct C–H functionalization of arylhydrazines
作者:Sai Zhang、Daorui Huang、Guangyang Xu、Shengyu Cao、Rong Wang、Shiyong Peng、Jiangtao Sun
DOI:10.1039/c5ob01171j
日期:——
Rhodium-catalyzed C–H bond activation of arylhydrazines and coupling with internal alkynes has been realized.
铑催化的芳基肼的C-H键活化并与内部炔烃偶联已经实现。
Rhodium-Catalyzed Synthesis of Isoquinolines and Indenes from Benzylidenehydrazones and Internal Alkynes
作者:Xiao-Cheng Huang、Xu-Heng Yang、Ren-Jie Song、Jin-Heng Li
DOI:10.1021/jo402497v
日期:2014.2.7
presented for the selective assembly of isoquinolines and indenes by rhodium-catalyzed tandem cyclization of benzylidenehydrazones with internal alkynes. This method involves the selective cleavage of the N–N bond and the C═N bonds and is dependent on the substituents of the benzylidenehydrazone.
An operationally simple EosinYcatalyzed sulfenylation of hydrazones has been realized to afford a range of thioethers under visible light. The methodology provides high yields of thioethers under ambient conditions employing readily available and inexpensive starting materials. The reaction has broad substrate scope and is compatible with various functional groups.
Exploring the Influence of Phosphine Ligation on the Gold-Catalyzed Hydrohydrazination of Terminal Alkynes at Room Temperature
作者:Nicolas L. Rotta-Loria、Alicia J. Chisholm、Preston M. MacQueen、Robert McDonald、Michael J. Ferguson、Mark Stradiotto
DOI:10.1021/acs.organomet.7b00373
日期:2017.7.10
The synthesis and/or NMR/X-ray characterization of a new series of (L)AuCl complexes is reported, featuring BippyPhos, AdJohnPhos, silyl ether based ligands including OTips-DalPhos, and PAd-DalPhos. These complexes, along with previously reported analogues featuring cataCXium-A, tBuJohnPhos, and Mor-DalPhos, were screened as precatalysts using LiB(C6F5)4·2.5Et2O as an activator in the hydrohydrazination