Claims
- 1. A dye selected from the group consisting of: [5,5-dimethyl-1-(1-pyrrolidinyl)-1-cyclohexen-3-ylidene]-malononitrile; decyl-[5,5-dimethyl-1-(1-pyrrolidinyl)-1-cyclohexen-3-ylidene] cyanoacetate; [5,5-dimethyl-1-(1-pyrrolidinyl)-1-cyclohexen-3-ylidene](methylsulfonyl)acetonitrile; and [5,5-dimethyl-1-(1-pyrrolidinyl)-1-cyclohexen-3-ylidene] (dodecylsulfonyl) acetonitrile.
- 2. A hemioxonol dye having the following formula: ##SPC9##
- wherein R.sub.1 and R.sub.2 each represents a member selected from the group consisting of cyano, acetyl, propionyl, butyryl, benzoyl, furoyl, thenoyl, alkoxycarbonyl of 1 to 4 carbon atoms in the alkoxy portion, alkylsulfonyl of 1 to 4 carbon atoms, phenylsulfonyl, naphthylsulfonyl and phenoxysulfonyl, provided not more than one of R.sub.1 and R.sub.2 represents alkylsulfonyl, phenylsulfonyl, phenoxysulfonyl or naphthylsulfonyl; R.sub.3 and R.sub.4 each represents a member selected from the group consisting of a hydrogen atom or lower alkyl of 1 to 4 carbon atoms; and R.sub.5 and R.sub.6 taken together with the nitrogen atom to which they are attached, form pyrrolidino.
Parent Case Info
This is a division of application Ser. No. 201,581, filed Nov. 23, 1971 now U.S. Pat. No. 3,813,397, issued May 28, 1974, which in turn is a division of U.S. Ser. No. 56,657 filed July 20, 1970 now U.S. Pat. No. 3,652,289 issued Mar. 28, 1972.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3449368 |
Shen et al. |
Jun 1969 |
|
3717629 |
Maier et al. |
Feb 1973 |
|
Divisions (2)
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Number |
Date |
Country |
Parent |
201571 |
Nov 1971 |
|
Parent |
56657 |
Jul 1970 |
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