3,3'(2'H,2H-Spirobibenzofuran compounds

Details 3,3'(2'H,2H-Spirobibenzofuran compounds 3,3'(2'H,2H-Spirobibenzofuran compounds

1987-03-30

1989-09-05

Raymond, Richard L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D49310

Patent

active

048640395

ABSTRACT:
A novel 3,3'(2H,2'H)-spirobibenzofuran compound is disclosed. The spirobibenzofuran compound has a strong antioxidizing action and is thus useful as an antioxidant for dyes, synthetic polymer products such as rubbers, plastics and the like, and for petroleum. In addition, the compound is effective in preventing fading and discoloration of color photographic images obtained by a subtractive color process.

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patent: 4113488 (1978-09-01), Yamada et al.
patent: 4332886 (1982-06-01), Aoki et al.
patent: 4360589 (1982-11-01), Kojima et al.

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