Copper-catalyzed cascade click/nucleophilic substitution reaction to access fully substituted triazolyl-organosulfurs
作者:Ming Li、Kun Dong、Yubin Zheng、Wangze Song
DOI:10.1039/c9ob02081k
日期:——
A novel cascade click/nucleophilic substitutionreaction is developed to access 4-heterofunctionalized fully substituted triazolyl-organosulfurs using thiocyanates as both leaving groups and organosulfur precursors. This method features high regioselectivities and board substrate scope. 33 examples are shown to demonstrate the structural diversity through the synthesis of fully substituted triazolyl-organosulfurs
Ruthenium‐Catalyzed Highly Regioselective Azide‐Internal Thiocyanatoalkyne Cycloaddition under Mild Conditions: Experimental and Theoretical Studies
作者:Wangze Song、Ming Li、Kun Dong、Yubin Zheng
DOI:10.1002/adsc.201901014
日期:2019.11.19
azide‐internal thiocyanatoalkyne cycloaddition reaction undermildconditions. This is the first time that fully substituted 5‐thiocyanato‐1,2,3‐triazoles have been prepared and the first time an AAC/nucleophilic substitution cascade reaction have been used to generate various fully substituted triazolyl‐organosulfurs, such as 5‐sulfur‐triazoles and 5‐sulfinylcyanato‐triazoles from common internal thiocyanatoalkyne
Enantioselective Copper Catalyzed Alkyne–Azide Cycloaddition by Dynamic Kinetic Resolution
作者:En-Chih Liu、Joseph J. Topczewski
DOI:10.1021/jacs.9b01091
日期:2019.4.3
The copper(I) catalyzed alkyne-azide cycloaddition (CuAAC), a click reaction, is one of the most powerful catalytic reactions developed during the last two decades. Conducting CuAAC enantioselectively would add a third dimension to this reaction and would enable the direct synthesis of α-chiral triazoles. Doing so is demanding because the two precursors have linear geometries, and the triazole product