A Concise Route to α′-Methoxy-γ-pyrones and Verticipyrone Based Upon the Desymmetrization of α,α′-Dimethoxy-γ-pyrone
作者:Michaël De Paolis、Helèna Rosso、Matthias Henrot、Cristina Prandi、Florent d'Herouville、Jacques Maddaluno
DOI:10.1002/chem.201001780
日期:——
Two steps is the rule: A concise synthesis of versatile α′‐methoxy‐γ‐pyrones (see scheme) is described that uses an innovative desymmetrization of α,α′‐dimethoxy‐γ‐pyrone, relying upon conjugate addition of nucleophiles. This new strategy is applied to the preparation of α‐methyl‐ and α‐carboxaldehyde‐α′‐methoxy‐γ‐pyrones and to a short synthesis of verticipyrone.
规则是两个步骤:描述了一种通用的α'-甲氧基-γ-吡喃酮的简明合成方法(参见方案),该方法利用创新的α,α'-二甲氧基-γ-吡喃酮的去对称性,依赖于亲核试剂的共轭加成。该新策略适用于制备α-甲基和α-甲醛,α'-甲氧基-γ-吡喃酮和维替吡酮的短合成。