4-TRIMETHYLSILOXYMETHYLPHOSPHINYL-2- TRIMETHYLSILOXY-2-BUTENNI- TRILE AS A SEMIPRODUCT FOR SYNTHESIS OF 4-BUTANOIC ACID SHOWING HERBICIDIC ACTIVITY, AND A METHOD OF ITS SYNTHESIS Russian patent published in 1994 - IPC

FIELD: organic chemistry. SUBSTANCE: product: 4-trimethylsiloxymethylphosphinyl -2- trimethylsiloxy-2 -butennitrile, empirical formula is C₁₁H₂₄NO₃PSi₂, yield is 90%, b. p. is 103-104 C (at 0.1 mm mercury column). Reagent 1: compound of the formula (I) (CH₃)₃SiCN. Reagent 2: . Reaction conditions: process is carried out in the presence of titanium tetrachloride at the molar ratio of reagents 1:(2-4):0.01 in the medium of chloroform, at 60-70 C for 6-7 h following by distillation or heating at 100-120 C for 1-2 h, or in the presence of triethylamine at the molar ratio of reagents 1:(2-4):(0.05-0.1), in the medium of chloroform at 100-110 C for 5-6 h. Product is used for synthesis of semiproduct used for synthesis of herbicidic preparation. EFFECT: improved method of synthesis. 4 cl, 2 tbl