The sydnone ring as an ortho-director of lithiation. 2.1 Dilithiation of 3-Phenylsydnone (cas 120-06-9) and regiospecific o-aryl acylation using N-methoxy-N-methylamides
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Add time:08/30/2019 Source:sciencedirect.com
Readily available 3-Phenylsydnone (cas 120-06-9) (1) reacts with n-butyllithium/TMEDA to form the dilithio species 2 which can be regiospecifically acylated at the ortho-aryl position using N-methoxy-N-methylamides (Weinreb's amides).
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