Diethylamino fluorans
Abstract
Abstract A CHROMOGENIC MATERIAL OF NORMALLY COLORLESS FORM IS DISCLOSED, HAVING A STRUCTURAL FORMULA: XANTHENE WHEREIN ONE OF R, R1 AND R2 REPRESENTS A CHEMICAL RADICAL FROM A GROUP COMPRISING -CO-R4,-O-R4, AND -CO-O-R4 WHEREIN R4 REPRESENTS HYDROGEN, ARYL RADICALS, AND ALKYL RADICALS; THE REMAINING OTHERS OF R, R1 AND R2 REPRESENT HYDROGEN, HALOGEN, AND ALKYL RADICALS; AND R3 REPRESENTS HYDROGEN AND ALKYL RADICALS HAVING LESS THAN FIVE CARBON ATOMS-SAID MATERIALS ASSUMING A COLORED FORM UPON REACTIVE CONTACT WITH A LWEIS ACID MOLECULE. EXAMPLES INCLUDE 2''-BENZYLOXY-L''-DIETHYLAMINOFLOURAN; 6''-DIETHYLAMINO-2''-FORMYLFLUORAN; 2''-CARBOMETHOXY-L''-DIETHYLAMINOFLUORAN; AND 2''-BENZOYL-6''-DIETHYLAMINO-4''-METHYLFLUORAN. 3-(O=),2''-R2,3''-R1,4''-R,6''-((R3-)2-N-)SPIRO(PHTHALAN-1,9''-
Inventors
- 👤 Chao-Han Lin
Bibliographic Details
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