A new palladium-catalyzed oxidative conversion of N-arylpropiolamides and H₂O to various indoline-2,3-diones and acids through the C≡C triple bond cleavage and C(sp²)–H functionalization is described, which is promoted by a cooperative action of catalytic CuBr₂, 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) and O₂. The method provides a practical tool for transformations of alkynes by means of a C–H functionalization strategy, which enables the formation of one C–C bond and multiple C–O bonds in a single reaction with high substrates compatibility and excellent functional group tolerance.

中文翻译：

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通过C≡C三键氧化裂解和C（sp 2）-H功能化将N-芳基丙酰胺转化为吲哚啉2,3-二酮和酸

描述了通过C tripleC三键裂解和C（sp ²）-H官能化作用，将新的钯催化的N-芳基丙酰胺和H ₂ O氧化转化为各种二氢吲哚-2,3-二酮和酸的过程，这一点受到促进。催化的CuBr的协作动作₂，2,2,6,6-四甲基-1-哌啶氧（TEMPO）和O ₂。该方法通过C–H官能化策略为炔烃的转化提供了实用的工具，该方法可在单个反应中形成一个C–C键和多个C–O键，并具有高的底物相容性和出色的官能团耐受性。