Tetrahedron p. 4789 - 4798 (1993)
Update date:2022-07-29
Topics:
Patterson, John W.
A new synthesis of mycophenolic acid 1, has been accomplished using silyloxy-1,3-cyclohexadiene 9 which undergoes cycloaddition to dimethyl acetylenedicarboxylate and subsequent elimination of ethylene (Alder-Rickert reaction) to give the trisubstituted dimethyl phthalate 11. After conversion of 11 to phthalide 16, the (E)-4-methyl-4-hexenoic acid side-chain was constructed via an orthoester Claisen rearrangement using allylic alcohol 19 and triethyl orthoacetate.
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