Trinapthylmethane compounds

Details Trinapthylmethane compounds Trinapthylmethane compounds

1976-06-01

1977-07-19

Curtis, Allen B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26032613R, C07C 3914, C07C 3916

Patent

active

040368637

ABSTRACT:
This invention relates to derivatives of phthalaldehydic and naphthalaldehydic acid useful as intermediates in the preparation of pH-sensitive phthalide and naphthalide indicator dyes.
A class of intermediates provided by the present invention comprises compounds of the formula: ##STR1## wherein A represents 4'-hydroxy-1'-naphthyl; B represents 4'-hydroxy-1'-naphthyl or indol-3-yl and C represents a 2-carboxy-1-phenyl radical or an 8-carboxy-1-naphthyl radical and preferably is 8-carboxy-1-naphthyl.

REFERENCES:
patent: 1460315 (1923-06-01), Montmollin et al.

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