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[2,2,2-TRIFLUOR-1-(2-HYDROXYPHENYL)ETHYL]-PHOSPHONSÄURE: MOLEKÜLSTRUKTUR VON [2,2,2-TRIFLUOR-1-(2-HYDROXYPHENYL)-ETHYL]DIMETHYLPHOSPHONAT

1992; Taylor & Francis; Volume: 73; Issue: 1-4 Linguagem: Inglês

10.1080/10426509208034436

1563-5325

Rolf‐Dieter Hund, Gerd‐Volker Röschenthaler,

Phosphorus compounds and reactions

Abstract The interaction of trimethylphosphite (1) and 2-trifluoroacetylphenol (2) yielded 4,5-benzo-2,2,2-trimethoxy-3-trifluoromethyl-1,2λ5[sgrave]5-oxaphosphol (3) and trimethylphosphate but not the expected 3-hydroxy derivative. Hydrolysis of compound 3 furnished the respective acyclic dimethylphosphonate 4 which was converted into the bis(trimethylsilyl)ester 5 and finally into the free phosphonic acid 6. O-trimethylsilylated compound 8 added to tris(trimethylsilyl)phospite (7) furnishing phosphonate 9 without abstracting the [sgrave]-oxygen. The molecular structure of 4 exhibited a somewhat distorted tetrahedral arrangement of substituents around phosphorus. An intermolecular hydrogen bridge O—H… O[dbnd]P was observed (O…O = 266.7 pm).