Organic Letters 2013-12-20

Regioselective functionalization of the oxazole scaffold using TMP-bases of Mg and Zn.

Diana Haas, Marc Mosrin, Paul Knochel

Index: Org. Lett. 15(24) , 6162-5, (2013)

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Abstract

A general method for the synthesis of 2,4,5-trisubstituted oxazoles has been developed. Starting from commercially available oxazole, successive metalations using TMPMgCl·LiCl or TMPZnCl·LiCl led to the corresponding magnesiated or zincated species which were stable toward ring fragmentation. Furthermore, they readily reacted with various electrophiles, such as aryl and allylic halides, acid chlorides, TMSCl, and TMS-CN, providing highly functionalized oxazoles.

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