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According to NMR data, the reaction of 2,2,2-trichloro-1,3,2λ5-benzodioxaphosphole with 1-iodo-2-phenylethyne leads to formation of 2,6-and 2,8-dichloro-3-iodo-4-phenyl-1,2λ5-benzoxaphosphinine 2-oxides which undergo partial hydrodeiodination to 2,6-and 2,8-dichloro-4-phenyl-1,2λ5-benzoxaphosphinine 2-oxides, respectively. [ABSTRACT FROM AUTHOR]

2,2,2-Trichloro-4-fluoro-1,3,2?5-benzodioxaphosphole reacts with phenylacetylene to give 2,7-dichloro-5-fluoro-4-phenyl-2H-1,2?5-benzoxaphosphinine 2-oxide. Hydrolysis of the latter leads to opening of the oxaphosphinine ring with formation of (E)-2-(4-chloro-2-fluoro-6-hydroxyphenyl)-2-phenylethenylphosphonic acid. [ABSTRACT FROM AUTHOR]

The article reports on the finding that 4,6-di-tert-butyl-2,2,2-trichloro-1,3,2λ5-benzodioxaphosphole, which has bulky tert-butyl groups, can react with 1-hexyne under mild conditions. This reaction produces exclusively 1,2λ5-benzoxaphosphinine derivatives. The product was confirmed by 31P nuclear magnetic resonance spectroscopy.

The article presents a study about the product in the chemical reaction of 2,2,2-trichloro-1,3,2λ5-benzodioxaphosphole-5-carbonyl chloride with hex-1-yne. The reactions of aryl- and alkylacetylenes with 2,2,2-trichloro(bromo)-1,3,2λ5-benzodioxaphosphole and some of its derivatives underlie a synthetic approach to 4-butyl-2,5-dichloro-2-oxo-1,2λ5-benzoxaphosphinine-6-carbonyl chloride.

The article investigates the reaction of dioxaphosphol with unsubstituted alkylacetylene. The reaction with propargyl chloride with phosphol resulted in two phosphorus-containing substances which gave rise to characteristic doublet signals of benzophosphorinines which were converted by hydrolysis into the corresponding acids.