Sourcing nitrogen from nitromethane Nitromethane is produced in bulk quantities for use as a solvent. Its applications as a reagent have focused mainly on the acidity of the methyl protons en route to modifying the carbon center. Liu et al. now report an alternative protocol that activates the nitrogen center to produce an aminating agent. An in situ reductive reaction with triflic anhydride, formic acid, and acetic acid yields an acetylated hydroxylamine, characterized by mass spectrometry. This nitrogen donor conveniently transforms a variety of ketones and aldehydes into amides. Science, this issue p. 281 An acetylated hydroxylamine conveniently derived in situ from nitromethane can turn ketones and aldehydes into amides. The Schmidt reaction has been an efficient and widely used synthetic approach to amides and nitriles since its discovery in 1923. However, its application often entails the use of volatile, potentially explosive, and highly toxic azide reagents. Here, we report a sequence whereby triflic anhydride and formic and acetic acids activate the bulk chemical nitromethane to serve as a nitrogen donor in place of azides in Schmidt-like reactions. This protocol further expands the substrate scope to alkynes and simple alkyl benzenes for the preparation of amides and nitriles.

中文翻译：

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硝基甲烷作为施密特型酰胺和腈形成中的氮供体

从硝基甲烷中获取氮气 硝基甲烷大量生产用作溶剂。它作为试剂的应用主要集中在甲基质子在改变碳中心的过程中的酸度。刘等人。现在报告一种替代方案，该方案激活氮中心以产生胺化剂。与三氟甲磺酸酐、甲酸和乙酸的原位还原反应产生乙酰化羟胺，通过质谱法表征。这种氮供体可以方便地将各种酮和醛转化为酰胺。科学，这个问题 p。281 方便地从硝基甲烷原位衍生的乙酰化羟胺可以将酮和醛转化为酰胺。自 1923 年发现以来，施密特反应一直是酰胺和腈的有效且广泛使用的合成方法。然而，其应用通常需要使用挥发性、潜在爆炸性和剧毒的叠氮试剂。在这里，我们报告了一个序列，其中三氟甲磺酸酐和甲酸和乙酸激活大量化学硝基甲烷，作为氮供体代替类施密特反应中的叠氮化物。该协议进一步将底物范围扩展到炔烃和简单的烷基苯，用于制备酰胺和腈。我们报告了一个序列，其中三氟甲磺酸酐和甲酸和乙酸激活大量化学硝基甲烷，作为氮供体代替类施密特反应中的叠氮化物。该协议进一步将底物范围扩展到炔烃和简单的烷基苯，用于制备酰胺和腈。我们报告了一个序列，其中三氟甲磺酸酐和甲酸和乙酸激活大量化学硝基甲烷，作为氮供体代替类施密特反应中的叠氮化物。该协议进一步将底物范围扩展到炔烃和简单的烷基苯，用于制备酰胺和腈。