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Study insights into the different cyclization mechanisms of ethyl cyanoacetate with salicylaldehyde and efficient synthesis of coumarin-3-carboxylate ester
The condensation of ethyl cyanoacetate and salicylaldehyde would afford either coumarin-3-carboxylate ester or 3-cyancoumarin as the final product. Herein, comparative experiments and density functional theory...