Compositions, process and systems
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United States of America Patent
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Jan 13, 1987
Issued Date -
N/A
app pub date -
Jan 17, 1985
filing date -
Mar 6, 1980
priority date (Note) -
Expired
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Abstract
3-[(Substituted-amino)(aryl or heteroaryl)methyl]-1H-indoles which are useful as color-formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting 3-[(arylsulfonyl)(aryl or heteroaryl)methyl]-1H-indoles with amines or precursors thereof in the presence of a base.
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