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Arylsulfonylacetamides as bifunctional reagents for alkene aminoarylation
Science ( IF 56.9 ) Pub Date : 2018-09-27 , DOI: 10.1126/science.aat2117
Timothy M Monos 1 , Rory C McAtee 1 , Corey R J Stephenson 1
Affiliation  

Arenes and amides from a single source Pharmaceutical synthesis often requires the formation of adjacent carbon-carbon and carbon-nitrogen bonds. Monos et al. present a method that delivers the carbon and nitrogen components in a single reagent, specifically, an aryl ring tethered through sulfur dioxide to an amide. A light-activated catalyst primes an olefin to react with the nitrogen, which in turn leads to migration of the aryl ring and loss of the sulfur bridge. The efficient room-temperature process is applicable to a variety of different arenes, including heterocycles. Science, this issue p. 1369 Photoredox catalysis activates alkenes to form adjacent C–C and C–N bonds through coupling with a single reagent. Alkene aminoarylation with a single, bifunctional reagent is a concise synthetic strategy. We report a catalytic protocol for the addition of arylsulfonylacetamides across electron-rich alkenes with complete anti-Markovnikov regioselectivity and excellent diastereoselectivity to provide 2,2-diarylethylamines. In this process, single-electron alkene oxidation enables carbon-nitrogen bond formation to provide a key benzylic radical poised for a Smiles-Truce 1,5-aryl shift. This reaction is redox-neutral, exhibits broad functional group compatibility, and occurs at room temperature with loss of sulfur dioxide. As this process is driven by visible light, uses readily available starting materials, and demonstrates convergent synthesis, it is well suited for use in a variety of synthetic endeavors.

中文翻译:

芳基磺酰乙酰胺作为烯烃氨基芳基化的双功能试剂

来自单一来源的芳烃和酰胺药物合成通常需要形成相邻的碳-碳和碳-氮键。莫诺斯等人。提出了一种将碳和氮组分传递到单一试剂中的方法,特别是通过二氧化硫连接到酰胺的芳基环。光活化催化剂引发烯烃与氮反应,进而导致芳基环迁移和硫桥损失。高效的室温工艺适用于各种不同的芳烃,包括杂环。科学,本期第 3 页。1369 Photoredox 催化激活烯烃通过与单一试剂偶联形成相邻的 C-C 和 C-N 键。使用单一双功能试剂进行烯烃氨基芳基化是一种简洁的合成策略。我们报告了一种催化方案,用于在富电子烯烃中添加芳基磺酰乙酰胺,具有完全的抗马尔科夫尼科夫区域选择性和出色的非对映选择性,以提供 2,2-二芳基乙胺。在这个过程中,单电子烯烃氧化能够形成碳-氮键,从而为 Smiles-Truce 1,5-芳基位移提供关键的苄基自由基。该反应是氧化还原中性的,表现出广泛的官能团相容性,并且在室温下发生并损失二氧化硫。由于该过程由可见光驱动,使用现成的起始材料,并展示了收敛合成,因此它非常适合用于各种合成工作。
更新日期:2018-09-27
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