Thiazine-1,1-dioxide and isothiazole-1,1-dioxide derivatives and

Details Thiazine-1,1-dioxide and isothiazole-1,1-dioxide derivatives and Thiazine-1,1-dioxide and isothiazole-1,1-dioxide derivatives and

1978-11-02

1981-08-11

Rizzo, Nicholas S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544 33, 544 62, 544133, 544135, 544368, 544 587, 546 95, 546209, 548207, 260239R, C07D27504

Patent

active

042835372

ABSTRACT:
In one embodiment, the present invention is concerned with 3,3-disubstituted sulfam(na)phthaleins wherein one of the 3-substituents is derived from a perhalomethylcarbinol-substituted phenol or 1-naphthol useful as intermediates in the preparation of certain N-acylated sulfam(na)phthalein compounds, which compounds find utility, e.g., as pH-sensitive indicator dyes or photographic light-screening dyes.
In another embodiment, the present invention is concerned with a method of synthesizing said sulfam(na)phthalein intermediates by reacting certain 3-substituted-benz[d]isothiazole-1,1-dioxides (or 3-substituted-naphtho[1,8-de]-1,2-thiazine-1,1-dioxides) and a 4-OLi-naphthyllithium compound or a 4-OLi-phenyllithium compound substituted in the 3-position with a lithiated perhalomethylcarbinol group.

REFERENCES:
Abramouitch, R., J. Chem. Soc., Perkin Trans I, 1974, (22), p. 2589.
Mustafa, A., J. Chem. Soc., (1952), p. 1339.
Dutt, J. Chem. Soc., 121, p. 2389, (1922).
Beilstein, "Handbuch der Organishen Chemie", vol. 27, p. 534.

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