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Modified Vilsmeier reactions of activated benzofurans with indolines: Synthesis of benzofuran-fused benzocarbazoles

โœ Scribed by David St.C. Black; Robert Rezaie


Publisher
Elsevier Science
Year
1999
Tongue
French
Weight
173 KB
Volume
40
Category
Article
ISSN
0040-4039

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Reactions of 3-substituted 4,6-dimethoxybenzofurans with formaldehyde and aryl aldeydes in the presence of acetic acid and phosphoryl chloride respectively give new macrocyclic calix[3]benzofurans, predominantly with an unsymmetrical linkage pattern. Incorporation of a t-butyl substituent at the 3-p