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US 2013/0172596 A1Published application
Process for preparing 6-chlorodibenzo[d,f][1,3,2]dioxaphosphepin
AssigneeBASF SE
InventorsUlrich Berens, Holger Ganz, Franz Niklaus Windlin, Alexander Tishkov
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Abstract
The present invention relates to a process for preparing 6-chlorodibenzo[d,f][1,3,2]dioxaphosphepin (I) which comprises reacting 2,2′-dihydroxybiphenyl with PCl3 in the presence of a catalytic amount of an acid salt of a nitrogen base, wherein the reaction is carried out in the absence of external organic solvents.
Claims20
1-11. (canceled)
A process for preparing 6-chlorodibenzo[d,f][1,3,2]dioxaphosphepin (I)
- which comprises reacting 2,2′-dihydroxybiphenyl (A1)
- with PCl3 in the presence of a catalytic amount of an acid salt of a nitrogen base, wherein the reaction is carried out in the absence of external organic solvents.
Dependencies are inferred from the claim text.