A new convenient strategy for the synthesis of 3-hydroxy-2-pyrrolidinone derivatives featuring regioselective CC coupling has been developed. This is a Cu (II) catalyzed cross dehydrogenative coupling (CDC) involving enamino-ketones of benzyl amines and di-alkyl acetylenedicarboxylate, followed by cyclization by primary amines. TBHP (tert-butyl hydroperoxide) has been used as the oxidant to promote the coupling protocol. This synthetic route principally demonstrates the scope of CDC reaction and also applicable to gram-scale synthesis.

中文翻译：

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铜催化的交叉脱氢偶联反应合成3-羟基-2-吡咯烷酮

已经开发了一种新的方便的合成具有区域选择性C C偶联特征的3-羟基-2-吡咯烷酮衍生物的策略。这是Cu（II）催化的交叉脱氢偶联（CDC），涉及苄胺和二烷基乙酰二羧酸二烯酯的烯氨基酮，然后被伯胺环化。TBHP（叔丁基氢过氧化物）已用作氧化剂来促进偶联方案。该合成路线主要证明了CDC反应的范围，也适用于克级合成。