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Chemoselective Lithiation of 1-Bromo-n-chloroalkanes.

โœ Scribed by Francisco Foubelo; Abdeslam Abou; Miguel Yus

Publisher
John Wiley and Sons
Year
2006
Weight
27 KB
Volume
37
Category
Article
ISSN
0931-7597

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โœฆ Synopsis

Abstract

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## Abstract magnified image Lithiation of __N__โ€protectedโ€2,3โ€dihydroโ€1,4โ€benzoxazines is described. Lithiation of __N__โ€(__tert__โ€butoxycarbonyl)โ€2,3โ€dihydroโ€1,4โ€benzoxazine (**1**) with BuLi/TMEDA occurred in the ฮฑโ€position to nitrogen on the heterocyclic ring, leading to the unexpected ringโ€ope