81116-48-5Relevant academic research and scientific papers
93. Aromatic Nucleophilic Substitution. Part 2. Preparation of Novel 3-Substituted Xanthone and Thioxanthone Derivatives
Fischer, Walter,Kvita, Vratislav
, p. 854 - 859 (1985)
The novel 3-nitro-9-oxo-9H-xanthene- and 3-nitro-9-oxo-9H-thioxanthene-1-carboxylic acids 2a-d were prepared by intramolecular acylation of 3-aryloxy- and 3-arylthio-5-nitrophthalic anhydrides 1 (Scheme).The 3-nitro group was readily substituted by O- and
O-acyloxime photoinitiators
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, (2008/06/13)
Oximeester compounds of the formulae I, II, III and IV whereinR1 is phenyl, C1-C20alkyl or C2-C20alkyl optionally interrupted by —O—, C2-C20alkanoyl or benzoyl, or R1 is C2-C12alkoxycarbonyl or phenoxycarbonyl; R1′ is C2-C12alkoxycarbonyl, or R1′ is phenoxycarbonyl, or R1′ is —CONR10R11 or CN; R2 is C2-C12alkanoyl, C4-C6alkenoyl, benzoyl, C2-C6alkoxycarbonyl or phenoxycarbonyl; R3, R4, R5, R6 and R7 are hydrogen, halogen, C1-C12alkyl, cyclopentyl, cyclohexyl, phenyl, benzyl, benzoyl, C2-C12alkanoyl, C2-C12alkoxycarbonyl, phenoxycarbonyl or a group OR8, SR9, SOR9, SO2R9 or NR10R11; R4′, R5′ and R6′ are hydrogen, halogen, C1-C12alkyl, cyclopentyl, cyclohexyl, phenyl, benzyl, benzoyl, C2-C12-alkanoyl, C2-C12alkoxycarbonyl, phenoxycarbonyl, or are a group OR8, SR9, SOR9, SO2R9, NR10R11; provided that at least one of R3, R4, R5, R6, R7, R′4, R′5 and R′6 is OR8, SR9 or NR10R11; R8, R9, R10 and R11 are for example hydrogen, C1-C12alkyl, phenyl; are suitable as initiators for the photopolymerization of radically polymerizable compounds.
Thioxanthonecarboxylic acids and thioxanthonecarboxylic acid derivatives
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, (2008/06/13)
Novel thioxanthonecarboxylic acids and thioxanthonecarboxylic acid derivatives of the formula I STR1 in which Y is --COOH, --CO-halogen, --CN or a carboxylic acid ester, thioester or amide group and X, Z and W are as defined in the patent claim, are described. The compounds of the formula I in which Y is other than --CO--halogen are suitable as sensitizers for photo-crosslinkable polymers or as initiators for photo-polymerization of ethylenically unsaturated compounds or for photo-chemical crosslinking of polyolefins. The acid halides of the formula I are starting materials for the preparation of the corresponding nitriles and carboxylic acid esters, thioesters and amides.
