(Diacetoxyiodo)benzene (Phl(OAc)(2)) was found to be a powerful reagent to induce the intramolecular oxidative bromocyclization of homoallylic sulfonamides utilizing KBr as the bromine source. The reaction affords 2-substituted-4-bromo-pyrrolidines in moderate to excellent yields under a mild metal-free condition, and offers good manipulability by avoiding the use of highly toxic and caustic bromine (Br-2). (C) 2007 Elsevier Ltd. All rights reserved.
乙酰基
碘对苯(Phl(OAc)(2))已被发现为一种强大的试剂,可诱导双烯醇
胺类物质的同分内氧化式
溴环化反应,其中KBr被用作
溴源。该反应可在温和且无
金属参与的条件下,通过不使用有毒且强腐蚀性强的
溴(Br₂),合成多种产率较高的2-取代-4-
溴吡咯酮,表明其具有良好的操作可行性。 (C)2007 Elsevier Ltd. 所有权利保留。