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 under mild conditions. 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
可以通过间接和直接方法制备完全取代的杂官能化三唑。间接策略是行之有效的,但有其局限性。本文中,我们开发了一种直接方法,可在温和条件下通过叠氮化物-内部硫氰酸根合炔烃环加成反应获得具有高区域选择性的完全取代的5-硫氰酸根合1,2,3-三唑。这是第一次制备完全取代的5-硫氰酸根合1,2,3-三唑,也是第一次使用AAC /亲核取代级联反应生成各种完全取代的三唑基-有机硫,例如5-硫常见的内部硫代氰基炔烃前体中的三唑和5-亚磺酰基氰基三唑。这种方法具有广泛的基材范围(34个示例),与水和空气的良好相容性,