9-julolidinyl derivatives and process of preparing them
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United States of America Patent
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Sep 29, 1987
Issued Date -
N/A
app pub date -
Sep 30, 1985
filing date -
Aug 6, 1981
priority date (Note) -
Expired
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Abstract
The invention provides processes for the preparation of both known and novel [bis(substituted-aryl) (indolyl)]methanes and [(substituted-aryl) (heteryl) (indolyl)]methanes, useful as color formers, particularly in carbonless duplicating and thermal marking systems, which comprises the interaction of [bis(substituted-aryl) (phenylsulfonyl)]methanes and [(substituted-aryl) (heteryl) (phenylsulfonyl)]methanes with indoles in the presence of either an alkaline or an acidic catalyst.
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