METHOD OF PREPARING ALPHA-TOCOPHEROL (VITAMIN E) Russian patent published in 2001 - IPC

FIELD: synthetic organic chemistry, more particularly preparation of heterocyclic tocopherol compound (vitamin E). SUBSTANCE: method comprises cyclocondensing 2,3,4-pentatrion oxime with butanol, the resulting 2,3,6-trimethyl-1,4-benzoquinone-1-oxime is deoximated into trimethyl-n-benzoquinine, reduced into trimethylhydroquinone, condensed with isophytol, and desired product is isolated by well known methods. Process makes it possible to prepare trimethylhydroquinone with sufficiently high yield (up to 50%) and high purity. EFFECT: improved purity of vitamin E. 5 ex