Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Patent
1987-12-09
1990-01-30
Rotman, Alan L.
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
546250, 546266, 546284, 546286, 546219, C07D213133, C07D21308, C07D21102
Patent
active
048974846
ABSTRACT:
A process is described for the preparation of compounds of the formula ##STR1## in which R and X are as defined in claim 1. The compounds of the formula (1) are valuable intermediates in the synthesis of triarylmethane dyes and triarylmethanelactones.
REFERENCES:
patent: 3849422 (1974-11-01), Weis
patent: 4414156 (1983-11-01), Scherrer et al.
patent: 4604243 (1986-08-01), Davidson
Journal of Heterocyclic Chemistry, 24: #4 (1987) pp. 1093-1102.
Hel. Chem. Acta 59, pp. 190-220.
Sutter Peter
Weis Claus D.
Ciba-Geigy Corporation
Mansfield Kevin T.
McC. Roberts Edward
Rotman Alan L.
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