Positive zincing: A wide range of polyfunctional aryl and heteroaryl zinc reagents were efficiently prepared in THF by direct zincation using (tmp)2Zn⋅2 MgCl2⋅2 LiCl (1), an exceptionally active base. Ester and cyano functions as well as aldehydes and nitro groups are tolerated. dba=dibenzylideneacetone, tmp=2,2,6,6-tetramethylpiperidide.
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Wunderlich et al. (2007) studied this question.
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