Synthesis of β-Hydroxynaphthoate Derivatives from Ketodioxinones via Benzyne Acyl-Alkylation and Aldol Condensation Cascade
作者:Hiroshi Takikawa、Arata Nishii、Keisuke Suzuki
DOI:10.1055/s-0035-1562514
日期:2016.10
functionalized β-hydroxynaphthoate derivatives are prepared by a two-step protocol: (1) acyl-alkylation of benzynes with ketodioxinones and (2) intramolecular aldol condensation. The substitution pattern of the products is related to polycyclic natural products derived from the type-II polyketide biosynthesis. A variety of highly functionalized β-hydroxynaphthoate derivatives are prepared by a two-step protocol:
致力于纪念Jean F. Normant教授 抽象的 通过两步操作方案可以制备多种高度官能化的β-羟基萘甲酸酯衍生物:(1)苯并炔酮与酮二恶英酮的酰基烷基化作用和(2)分子内醛醇缩合反应。产品的取代方式与源自II型聚酮化合物生物合成的多环天然产品有关。 通过两步操作方案可以制备多种高度官能化的β-羟基萘甲酸酯衍生物:(1)苯并炔酮与酮二恶英酮的酰基烷基化作用和(2)分子内醛醇缩合反应。产品的取代方式与源自II型聚酮化合物生物合成的多环天然产品有关。
Synthesis of 6-Substituted-4-Hydroxy-2-pyridinones via Intramolecular Ketene Trapping of Functionalized Enamine-Dioxinones
作者:Bhavesh H. Patel、Andrew M. Mason、Anthony G. M. Barrett
DOI:10.1021/ol202028t
日期:2011.10.7
The synthesis of various 6-substituted-4-hydroxy-2-pyridinones is reported. The functionalized keto-dioxinones were constructed via a diethylzinc mediated crossed Claisen condensation reaction and subsequent enamine formation, thermolysis, and cyclization–aromatization providing the pyridinone unit.