Citation:
SHEN Run-Pu, PI Shi-Qing, XIE Bin, HUANG Hong-Jun, CHEN Xin-Zhi. An Improved Method for Synthesis of Vitamin A Derivatives via Wittig-Horner Reaction[J]. Chinese Journal of Applied Chemistry,
;2003, 20(12): 1211-1213.
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Wittig-Horner method for the synthesis of Vitamin A derivatives is improved:3-methyl-5-(2,6,6-trimethyl-1-cyclohexen-1-yl)-1,3(or 1,4)-pentadienyl phosphonate is reacted directly with C5-aldehyde in synthesis and a double bond rearrangment step catalysted by base is curtailed.
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