Citation: Yao Dong HUANG, Xiao Jie ZHANG, Ze Xu WANG, Fen Er CHEN. An Improved Synthesis of Retinoic Acid from β-Ionone[J]. Chinese Chemical Letters, ;2003, 14(1): 29-31.
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A convenient and large-scale preparation of rctinoic acid 1 from β-ionone in five steps with 38% overall yield is described. The key steps are the epoxidization of 2 with a new methylated agent and the condensation 4 with tetraethyl methylenediphophonate in one-pot procedure to prepare 6.
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