Spirobenzanthracene phthalide compounds, processes for preparing

Details Spirobenzanthracene phthalide compounds, processes for preparing Spirobenzanthracene phthalide compounds, processes for preparing

1987-07-14

1988-12-27

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Dye image from radiation sensitive dye or dye former by dry...

Composition or product

430346, 430351, 430964, 503218, 503217, 503219, 549265, 544 70, 548407, 546 15, G03C 1733, G03C 516, C07D30794

Patent

active

047940697

ABSTRACT:
Spirobenzanthracene phthalide compounds are disclosed of the formula (I) ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 independently represent C.sub.1 -C.sub.8 alkyl optionally substituted by C.sub.1 -C.sub.5 alkoxy; C.sub.5 or C.sub.6 cycloalkyl; or aralkyl or aryl optionally substituted by C.sub.1 -C.sub.5 alkyl or C.sub.1 -C.sub.5 alkoxy, and R.sup.1 and R.sup.2, R.sup.3 and R.sup.4, and R.sup.5 and R.sup.6 taken together with the nitrogen atom to which they are attached, may form pyrrolidino, piperidino or morpholino ring, and R.sup.7, R.sup.8, R.sup.9 and R.sup.10 independently represent hydrogen, C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.5 alkoxy or trifluoromethyl. The compounds are used, together with a developer, in color for materials such as pressure-sensitive copying papers, heat-sensitive recording papers and the like.

REFERENCES:
patent: 3377167 (1968-04-01), Fichter
patent: 3997541 (1976-12-01), Schefczik et al.
patent: 4024157 (1977-05-01), Hotta et al.

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