Quinoxalinepentamethine dyes and optical recording medium contai

Details Quinoxalinepentamethine dyes and optical recording medium contai Quinoxalinepentamethine dyes and optical recording medium contai

1990-10-26

1991-11-12

Ryan, Patrick J.

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Circular sheet or circular blank

Recording medium or carrier

428 65, 428204, 428206, 428207, 4284111, 428913, 369288, 346 76L, 3461351, 430270, 430495, 430945, B32B 302

Patent

active

050647024

ABSTRACT:
Quinoxalinepentamethine dyes of the formula ##STR1## where R.sup.1 is hydrogen, substituted or unsubstituted C.sub.1 -C.sub.22 -alkyl or substituted or unsubstituted C.sub.5 -C.sub.7 -cycloalkyl,

REFERENCES:
patent: 4460665 (1984-07-01), Kunikane et al.
CA112(6):38114j, Dimerization Reactions of Cyanine Radical Dictation, Parton et al, 1990.
CA 74(22):113194n, Syntheses with Substituted Malonaldehydes, Reichardt et al, (1971).
CA 73(4): 16252b, Syntheses with Substituted Malonaldehydes, Reichardt et al, (1970).

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