Process for preparing tetrazolyl-benzopyranones

Details Process for preparing tetrazolyl-benzopyranones Process for preparing tetrazolyl-benzopyranones

C - Chemistry, Metallurgy

07

D

C07D 405/04 (2006.01) C07D 257/04 (2006.01) C07D 409/12 (2006.01) C07D 409/14 (2006.01)

Patent

CA 2149886

A process for preparing substituted benzopyran derivatives, which comprises a final step cyclisation of the corresponding open-chain intermediates. (See formula I)

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