Interrupted CuAAC-Thiolation for the Construction of 1,2,3-Triazole-Fused Eight-Membered Heterocycles from O-/N-Propargyl derived Benzyl Thiosulfonates with Organic Azides,Advanced Synthesis & Catalysis

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Interrupted CuAAC-Thiolation for the Construction of 1,2,3-Triazole-Fused Eight-Membered Heterocycles from O-/N-Propargyl derived Benzyl Thiosulfonates with Organic Azides
Advanced Synthesis & Catalysis ( IF 4.4 ) Pub Date : 2021-11-18 , DOI: 10.1002/adsc.202101256
Raju Jannapu Reddy ₁ , Waheed Md. ₁ , Haritha Kumari Arram ₁ , Rama Krishna Gamidi ₂

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A copper(I)-catalyzed interrupted click-sulfenylation of O-/N-propargyl benzyl thiosulfonates with organic azides has been disclosed. The unified CuAAC-thiolation provides a wide range of triazole-fused eight-membered heterocycles in good to high (51–94%) yields under mild reaction conditions. Moreover, a three-component reaction is also achieved involving O-/N-propargyl benzyl thiosulfonates, benzyl bromide, and sodium azide to deliver fused-triazoles in 61–74% yields. From a synthetic point of view, the present protocol has been demonstrated at gram-scale reactions. A plausible mechanism is also proposed based on experimental results and control experiments.

中文翻译：

用有机叠氮化物从 O-/N-炔丙基衍生的硫代磺酸苄酯构建 1,2,3-三唑-稠合八元杂环的中断 CuAAC-硫醇化

已公开了铜 (I) 催化的O-/N-炔丙基苄基硫代磺酸盐与有机叠氮化物的间断点击亚磺酰化。在温和的反应条件下，统一的 CuAAC-硫醇化提供了范围广泛的三唑稠合八元杂环，产率从好到高（51-94%）。此外，还实现了涉及O-/N-炔丙基苄基硫代磺酸盐、苄基溴和叠氮化钠的三组分反应，以 61-74% 的收率提供稠合三唑。从合成的角度来看，本协议已在克级反应中得到证明。基于实验结果和对照实验，还提出了一种似是而非的机制。

更新日期：2022-01-18

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