http://rdf.ncbi.nlm.nih.gov/pubchem/patent/BE-902790-A

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http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D335-16
filingDate 1985-07-01-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationDate 1986-01-02-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber BE-902790-A
titleOfInvention PROCESS FOR THE PREPARATION OF XANTHONES AND THIOXANTHONES.
abstract Process for the preparation of compounds of formula in which X signifies O or S, the symbols R signify a condensed aromatic residue, R1 signifies an organic radical and n 'signifies 0,1,2 or 3, which consists in reacting a compound of formula II where the two symbols R3 signify an alkoxy group or else one of the symbols R3 signifies an alkoxy group and the other a halogen atom, with sulfur in an alkaline medium, a metal sulfide or a metal hydrogen sulfide. The compounds of formula I and II are useful as photopolymerization initiating agents.
priorityDate 1984-07-12-04:00^^<http://www.w3.org/2001/XMLSchema#date>
type http://data.epo.org/linked-data/def/patent/Publication

Incoming Links

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Total number of triples: 27.