Process for preparing tetrazol-5-yl substituted benzopyran compo

Details Process for preparing tetrazol-5-yl substituted benzopyran compo Process for preparing tetrazol-5-yl substituted benzopyran compo

1995-05-26

1996-12-24

Springer, David B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548253, C07D40504, C07D25704

Patent

active

055874835

ABSTRACT:
A process for preparing substituted benzopyran derivatives which comprises a final step cyclisation of the corresponding open-chain intermediates.

REFERENCES:
patent: 4780469 (1988-10-01), Toda et al.

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