[EN] PROCESS FOR THE MANUFACTURE OF TOCYL AND TOCOPHERYL ACYLATES<br/>[FR] PROCEDE DE PREPARATION D'ACRYLATES DE TOCYLE ET DE TOCOPHERYLE
申请人:DSM IP ASSETS BV
公开号:WO2004096790A1
公开(公告)日:2004-11-11
A process for the manufacture of a tocyl acylate or a tocopheryl acylate comprises reacting tocol or a tocopherol with an acylating agent in the presence of a catalyst of the general formula HC1R2R3, wherein R1, R2 and R3 each signify the sulpho group, or R1, R2 and R3 each signify a perfluoroalkylsulphonyl group whereby at least two of R1, R2 and R3 are identical such perfluoroalkyl-sulphonyl groups, or R1 signifies the pentafluorophenyl-sulphonyl group and R2 and R3 each signify an identical perfluoroalkylsulphonyl group. The main commercial form of vitamin E, being (all-rac)-α-tocapheryl acetate, can be manufactured by acylation of (all-rac)-α-tocopherol according to this process.
[EN] PROCESS FOR THE MANUFACTURE OF TOCYL AND TOCOPHERYL ACYLATES<br/>[FR] PROCEDE DE PRODUCTION DE TOCYL ACYLATE ET DE TOCOPHERYL ACYLATE
申请人:DSM IP ASSETS BV
公开号:WO2004096791A3
公开(公告)日:2005-01-06
Afanas'ev, I. B.; Kupriyanova, N. S.; Grabovetskii, V. V., Journal of general chemistry of the USSR, 1986, vol. 56, # 6, p. 1172 - 1183
作者:Afanas'ev, I. B.、Kupriyanova, N. S.、Grabovetskii, V. V.
DOI:——
日期:——
Total Synthesis of All Eight Stereoisomers of ?-Tocopheryl Acetate. Determination of their diastereoisomeric and enantiomeric purity by gas chromatography
作者:Noal Cohen、Clifford G. Scott、Christian Neukom、Rocco J. Lopresti、Giuseppe Weber、Gabriel Saucy
DOI:10.1002/hlca.19810640422
日期:1981.6.10
Alleightstereoisomers of α-tocopheryl acetate have been synthesized in a state of high chemical and stereoisomeric purity. Key chiral side-chain intermediates were prepared from (+)-(S)-3-hydroxy-2-methylpropanoic acid. New routes to (2R, 4′ RS, 8′ RS)-α-tocopheryl acetate, a mixture of four diastereoisomers, were also developed. A sensitive gas chromatographic method was developed to determine the