Process for the manufacture of bis-benzo-furanyl compounds

Details Process for the manufacture of bis-benzo-furanyl compounds Process for the manufacture of bis-benzo-furanyl compounds

1980-09-11

1982-01-05

Demers, Arthur P.

Harness for working animal

26034622, 26034671, 26034673, 542459, 542466, C07D40706, C07D40710, C07D40714

Patent

active

043095364

ABSTRACT:
Process for the manufacture of optically brightening bis-benzofuranyl compounds by cyclization of compounds of the formula ##STR1## in aprotic solvents and in the presence of alkali metal or alkaline earth metal carbonates.

REFERENCES:
patent: 3859350 (1975-01-01), Sahm et al.
patent: 3932301 (1976-01-01), Crounse et al.
patent: 3974172 (1976-08-01), Sahm et al.
patent: 4122257 (1978-10-01), Prossel et al.
patent: 4133953 (1979-01-01), Schinzel
patent: 4230624 (1980-10-01), LeCorre et al.

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