Palladium-catalyzed carbonylative Sonogashira coupling between aryl triazenes and alkynes
作者:Wanfang Li、Xiao-Feng Wu
DOI:10.1039/c5ob00502g
日期:——
We developed a palladium-catalyzed carbonylative Sonogashira reaction with aryl triazenes and alkynes as substrates and methanesulfonic acid as the additive. A series of α,β-ynones were synthesized by this alternative procedure. Notably, bromides, iodides and hydroxyl groups could be well-tolerated under these reaction conditions.
1-Aryl-3,3-dialkyltriazenes give excellent yields of easily isolated aryl iodides upon treatment with methyl iodide.
Catalytic conversion of aryl triazenes into aryl sulfonamides using sulfur dioxide as the sulfonyl source
作者:Wanfang Li、Matthias Beller、Xiao-Feng Wu
DOI:10.1039/c4cc03481c
日期:——
Gaseous sulfur dioxide was incorporated into triazenes to form various sulfonamides, catalyzed by boron trifluoride and copper chloride.
气态二氧化硫在三氮烯中被催化剂三氟化硼和氯化铜催化形成各种磺胺类化合物。
N<sub>2</sub> Extrusion and CO Insertion: A Novel Palladium-Catalyzed Carbonylative Transformation of Aryltriazenes
作者:Wanfang Li、Xiao-Feng Wu
DOI:10.1021/acs.orglett.5b00603
日期:2015.4.17
A novel procedure for the replacement of N-2 with CO of aryltriazenes has been developed. Aryltriazenes were converted to the corresponding arylamides catalyzed by 1 mol % of PdCl2/P(o-Tol)(3) under CO pressure. In this process, aryldiazonium salts were generated in the presence of 40 mol % of MeSO3H. Nitrogen was released from the substrates and CO formally inserted. Aryl bromides, iodides, alkynes, and free hydroxyl groups can be tolerated in this transformation.