| 摘要 |
FIELD: organic chemistry, organic synthesis, chemical technology. ^ SUBSTANCE: invention relates to a method for synthesis of 2-methyl-1,4-naphthoquinone (menadione, vitamin K3) that is used broadly in medicinal practice and animal husbandry. Method for synthesis of 2-methyl-1,4-naphthoquinone involves oxidation of 2-methyl-1-naphthol with oxygen or oxygen-containing gas in medium of a low-polar or nonpolar organic solvent or in 2-methyl-1-naphthol melt at intensive stirring, under pressure 1 atm, not less, and temperature 20°C, not less. Method provides simplifying technology and preparing the end product of high purity and high yield. ^ EFFECT: improved preparing method. ^ 4 cl, 1 tbl, 17 ex |
