Pd-Catalyzed Sequential C–C Bond Formation and Cleavage: Evidence for an Unexpected Generation of Arylpalladium(II) Species
摘要:
A Pd(II)-catalyzed reaction engaging alkenyl beta-keto esters is reported that leads to the formation of 1-naphthols and an unexpected generation of arylpalladium-(II) species. Interception of the in situ generated arylpalladium(II) species in a Mizoroki-Heck reaction, together with additional mechanistic studies, provided strong evidence in support of the first aromatization-driven beta-carbon elimination process. A single Pd catalyst served to promote a series of both C-C bond forming and cleavage events in an unprecedented manner.
A new route to 4-hydroxytetralones and 1-naphthols
作者:Nigel J. P. Broom、Peter G. Sammes
DOI:10.1039/p19810000465
日期:——
bases, participate in Michael addition reactions with a variety of conjugated olefins. For singly-activated olefins the conjugate anion reacts intramolecularly with the lactone group to produce 4-hydroxytetralones in moderate to good yield. Dehydration of these hydroxytetralones, by brief treatment with acid, produces the corresponding α-naphthol. Substituted phthalides react similarly making the method
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。
Access to Naphthoic Acid Derivatives through an Oxabenzonorbornadiene Rearrangement
作者:Daniel Lücke、Alexander S. Campbell、Martin Petzold、Richmond Sarpong
DOI:10.1021/acs.orglett.3c02823
日期:2023.10.13
Herein, the synthesis of 1-hydroxy-2-naphthoic acid esters through an unexpected Lewis-acid-mediated 1,2-acyl shift of oxabenzonorbornadienes is reported. Using this methodology, novel substitution patterns for 1-hydroxy-2-naphtoic acid esters can be obtained. A mechanistic proposal and rationale for this transformation, the products of which had been previously incorrectly characterized, is given