| 摘要 |
<p>1,273,770. Heterocyclic phosphoric and thiophosphoric acid derivatives. FARBENFABBIKEN BAYER A.G. 1 Aug., 1969 [20 Aug., 1968], No. 38631/69. Headings C2C and C2P. Novel compounds of the formula where R and R<SP>1</SP> are C 1-6 alkyl, X and Y are oxygen or sulphur, and n is 1 or 2, are prepared (a) by reacting a compound of formula with (RO)(R<SP>1</SP>O)P(Y)(SH) in the presence of an acid-binding agent or in the form of an alkali metal, alkaline earth metal or ammonium salt, or (b) by reacting a hydroxy compound of formula with a halide of formula (RO)(R<SP>1</SP>O)P(Y)(Hal) in the presence of a hydrogen halide acceptor or (c) reacting the hydroxy compound of (b) with a halide of formula (RO)(R<SP>1</SP>O)PHal in the presence of a halogen hydride acceptor and oxidizing the product or treating it with elemental sulphur or a sulphur-yielding agent. The hydroxymethyl starting materials are prepared by reacting 2,3-di-mercaptopropanol-(1) with an alkali metal methylate and treating the resulting mercaptide with a dihalo-methane or -ethane, or by reacting the dimercaptol with paraformaldehyde in dichloromethane or ethane in the presence of p-toluene sulphonic acid, or in the presence of HCl gas to yield the corresponding chloromethyl compound. The chloro compound is also prepared by reacting the hydroxymethyl compound with e.g. thionyl chloride. The compounds of Formula I may be used, with or without solvents and diluents as insecticides and acaricides.</p> |
