Various 1,3‐dimethyl and 1‐methyl‐3‐phenylfuro[3,4‐c]coumarins (5a‐h and 6a‐h) have been synthesized by demethylation cyclization of the respective 3‐aryl‐4‐ethoxycarbonyl furans (3a‐h and 4a‐h). These ethoxycarbonyl furans were prepared by reacting appropriate 1‐aryl‐2‐nitro‐prop‐1‐ene (1a‐h) with ethyl acetoacetate or ethyl benzoylacetate under Nef reaction condition.

Synthesis of 3-(6-Aryl-pyridin-2-yl)-and 8-(6-Aryl-pyridin-2-yl) Coumarins -[via reaction of Mannich bases derived from acetylcoumarins with pyridinium salts (II) under Kroehnke-type reaction conditions]. -(BRAHMBHATT*, D. I.; GAJERA, J. M.; PANDYA, V. P.; PATEL, M. A.; Indian J.

OMe CHO R O O O R' Me R 3 steps Various 1,3-dimethyl and 1-methyl-3-phenylfuro[3,4-c]coumarins (5a-h and 6a-h) have been synthesized by demethylation cyclization of the respective 3-aryl-4-ethoxycarbonyl furans (3a-h and 4a-h). These ethoxycarbonyl furans were prepared by reacting appropriate 1-aryl-2-nitro-prop-1-ene (1a-h) with ethyl acetoacetate or ethyl benzoylacetate under Nef reaction condition.

Coumarins. -The title compounds are synthesized by reacting coumarinoylmethylpyridinium bromide (IV) with Mannich bases (V) and α,β-unsaturated ketones (VII), resp., under Kroehnke's reaction condition. -(BRAHMBHATT*, D. I.; PATEL, C. N.; PANDYA, V. P.; PATEL, M. A.; Indian J.

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