Synthesis p. 939 - 940 (1992)
Update date:2022-08-17
Topics:
Dehmlow
Veretenov
Cycloaddition of ketene dimethyl acetal (7) to dimethyl butynedioate (8) followed by electrocyclic ring opening yields diene 10. This can be hydrolyzed readily to the title compound 1.
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