4-substituted amido-8-disubstituted aminoimidazophenoxazines
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United States of America Patent
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Aug 5, 1986
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N/A
app pub date -
Sep 3, 1985
filing date -
Jul 31, 1984
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Expired
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Abstract
4-(N-Acylamino)-8-(N-R.sup.1 -N-R.sup.2 -amino)imidazophenoxazines useful as color formers, particularly in electrochromic recording systems, are prepared by the interaction of the corresponding 1,3-diamino-7-(N-R.sup.1 -N-R.sup.2 -amino)phenooxazinium halide with a reducing agent to obtain the corresponding leuco compound and subsequently interacting the leuco compound with at least two molecular proportions of an acylating agent.
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