Abstract: Fluoran compounds are disclosed of formula (I) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently represent hydrogen, halogen, lower alkoxy, C.sub.1 -C.sub.9 -alkyl, C.sub.5 or C.sub.6 -cycloalkyl, benzyl or phenyl, said benzyl or phenyl being optionally substituted by halogen, lower alkyl or lower alkoxy, and further R.sub.1 and R.sub.2 as well as R.sub.3 and R.sub.4 taken together with Ring A, may form a naphthalene ring optionally substituted by halogen, lower alkyl or lower alkoxy, R.sub.5, R.sub.6 and R.sub.7 independently represent halogen, lower alkyl or lower alkoxy, B.sub.1 and B.sub.2 independently represent hydrogen, C.sub.1 -C.sub.8 -alkyl, benzyl or phenyl, said benzyl or phenyl being optionally substituted by halogen, lower alkyl, lower alkoxy, or alkyl-substituted, X represents hydrogen atom or --NR.sub.8 R.sub.9 wherein R.sub.8 and R.sub.9 independently represent hydrogen, C.sub.1 -C.sub.8 -alkyl, C.sub.5 or C.sub.

Abstract: Fluoran compounds are disclosed of formula (I) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently represent hydrogen, halogen, lower alkoxy, C.sub.1 -C.sub.9 -alkyl, C.sub.5 or C.sub.6 -cycloalkyl, benzyl or phenyl, said benzyl or phenyl being optionally substituted by halogen, lower alkyl or lower alkoxy, and further R.sub.1 and R.sub.2 as well as R.sub.3 and R.sub.4 taken together with Ring A, may form a naphthalene ring optionally substituted by halogen, lower alkyl or lower alkoxy, R.sub.5, R.sub.6 and R.sub.7 independently represent halogen, lower alkyl or lower alkoxy, B.sub.1 and B.sub.2 independently represent hydrogen, C.sub.1 -C.sub.8 -alkyl, benzyl or phenyl, said benzyl or phenyl being optionally substituted by halogen, lower alkyl, lower alkoxy, or alkyl-substituted amino, X represents hydrogen atom or --NR.sub.8 R.sub.9 wherein R.sub.8 and R.sub.9 independently represent hydrogen, C.sub.1 -C.sub.8 -alkyl, C.sub.5 or C.sub.

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.

Abstract: The fluoran compounds of the formula (I) are new red color forming chromogenic dyes. ##STR1## wherein R represents an isobutyl or isopentyl group, R.sub.1 represents a hydrogen or halogen atom or an alkyl group, R.sub.2 represents a hydrogen or halogen atom or an alkyl group, R.sub.3 represents a hydrogen atom, and R.sub.4 represents a hydrogen atom, or R.sub.4 and R.sub.1 as well as R.sub.2 and R.sub.3 taken together with the carbon atoms to which they are attached may form a benzene ring which may be substituted with a halogen atom. They are used, together with an acidic developer, in chromogenic recording materials for use in pressure sensitive copying paper, heat-sensitive recording paper and thermo-sensitive, reversible color changing composition.

Abstract: The fluoran compounds of the formula (I) are new red color forming chromogenic dyes. ##STR1## wherein R represents an isobutyl or isopentyl group, R.sub.1 represents a hydrogen or halogen atom or an alkyl group, R.sub.2 represents a hydrogen or halogen atom or an alkyl group, R.sub.3 represents a hydrogen atom, and R.sub.4 represents a hydrogen atom, or R.sub.4 and R.sub.1 as well as R.sub.2 and R.sub.3 taken together with the carbon atoms to which they are attached may form a benzene ring which may be substituted with a halogen atom. They are used, together with an acidic developer, in chromogenic recording materials for use in pressure sensitive copying paper, heat-sensitive recording paper and thermo-sensitive, reversible color changing composition.

Abstract: 3-N-isobutyl-ethylamino-7-phenylaminofluoran is a new green color former. It is used, together with an acidic substance, in color forming record materials for use in pressure sensitive copying paper, heat-sensitive recording paper and the like.