Process for preparing polycyclic heterocycles having a pyran rin

Details Process for preparing polycyclic heterocycles having a pyran rin Process for preparing polycyclic heterocycles having a pyran rin

1975-06-05

1977-05-03

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260295R, 26032627, 260329HS, 260329AM, 2603325, 2603452, 2603458, 2603459, 424256, 424263, 424274, 424275, 424285, C07D33324

Patent

active

040214516

ABSTRACT:
A process applicable to the preparation of a wide variety of novel polycyclic heterocycles having a newly-formed pyran ring is disclosed. According to the process an aromatic nucleus bearing an ethanol group, for example, 3,4-dimethoxyphenethyl alcohol, is condensed with an aldehyde or ketone or a protected aldehyde or ketone, for example, aminoactaldehyde diethyl acetal, in the presence of an acid catalyst to afford the polycyclic heterocycle, for example, 6,7-dimethoxy-1-isochromanmethylamine. The new heterocycles so formed are useful for preparing derivatives having antiinflammatory, antibacterial or antifungal activities.

REFERENCES:
patent: 3801597 (1974-04-01), Makisumi
patent: 3883551 (1975-05-01), Razdan
patent: 3895034 (1975-07-01), Winn et al.

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