2,5,6,7,8-Pentasubstituted (S)- and (R)-[2-chroman-2-yl]ethanols as intermediates for the synthesis of α-tocopherol and its chiral analogs
In the presence of lipase from the yeast Candida cylindracea, partial acetylation of (±)-2-[6-benzyloxy-2,5,7,8-tetramethylchroman-2-yl]ethanol with vinyl acetate gives S-(+)-acetate whose alkaline hydrolysis affords (5)-( - )-alcohol. Repeated enzymatic
A synthesis of vitamin E in racemic or optically active forms from methacryolein or beta-hydroxyisobutyric acid including intermediates in this synthesis.
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(2008/06/13)
Synthetic studies on (2R,4'R,8'R) α tocopherol. An approach utilizing side chain synthons of microbiological origin
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Cohen,Eichel,Lopresti,Neukom,Saucy
p. 3505 - 3511
(2007/10/05)
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