Antitumor agents 287. Substituted 4-amino-2H-pyran-2-one (APO) analogs reveal a new scaffold from neo-tanshinlactone with in vitro anticancer activity
摘要:
4-Amino-2H-benzo[h] chromen-2-one (ABO) and 4-amino-7,8,9,10-tetrahydro-2H-benzo[h] chromen-2-one (ATBO) analogs were found to be significant in vitro anticancer agents in our previous research. Our continuing study has now discovered a new simplified (monocyclic rather than tricyclic) class of cytotoxic agents, 4-amino-2H-pyran-2-one (APO) analogs. By incorporating various substituents on the pyranone ring, we have established preliminary structure-activity relationships (SAR). Analogs 19, 20, 23, and 26-30 displayed significant tumor cell growth inhibitory activity in vitro. The most active compound 27 exhibited ED50 values of 0.059-0.090 mu M. (C) 2011 Elsevier Ltd. All rights reserved.
Antitumor agents 287. Substituted 4-amino-2H-pyran-2-one (APO) analogs reveal a new scaffold from neo-tanshinlactone with in vitro anticancer activity
摘要:
4-Amino-2H-benzo[h] chromen-2-one (ABO) and 4-amino-7,8,9,10-tetrahydro-2H-benzo[h] chromen-2-one (ATBO) analogs were found to be significant in vitro anticancer agents in our previous research. Our continuing study has now discovered a new simplified (monocyclic rather than tricyclic) class of cytotoxic agents, 4-amino-2H-pyran-2-one (APO) analogs. By incorporating various substituents on the pyranone ring, we have established preliminary structure-activity relationships (SAR). Analogs 19, 20, 23, and 26-30 displayed significant tumor cell growth inhibitory activity in vitro. The most active compound 27 exhibited ED50 values of 0.059-0.090 mu M. (C) 2011 Elsevier Ltd. All rights reserved.
Synthesis of 6-Substituted 4-Hydroxy-2-pyrones from Aldehydes by Addition of an Acetoacetate Equivalent, Dess-Martin Oxidation and Subsequent Cyclization
作者:Thorsten Bach、Stefan Kirsch
DOI:10.1055/s-2001-18759
日期:——
A three step procedure for the synthesis of 6-substituted 4-hydroxy-2-pyrones 2 from aldehydes 1 is described. An acetoacetate equivalent 3 was added to the corresponding aldehyde (10 examples) in a vinylogous Mukaiyama aldol addition (72-99%). The intermediate alcohols 4 were oxidized to the ketones 5 using the Dess-Martin method (67%-quant.). A final thermal cyclization of compounds 5 yielded the title compounds 2 (61-92%; 40-85% overall).
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.
The efficient synthesis of γ-thiapyrones by a base-mediated Diels–Alder/retro-Diels–Alder reaction of α-pyrones with 5-H-1,2,3-thiadiazoles is reported herein. Thioketenes in situ generated from thiadiazoles as electron-poor dienophile and electron-rich 4-hydroxy-2-pyrones as dienes are conjunctively transformed into a series of γ-thiapyrones with broad functional group compatibility in good to excellent
Facile Syntheses of 2,2-Dimethyl-6-(2-oxoalkyl)-1,3-dioxin-4-ones and the Corresponding 6-Substituted 4-Hydroxy-2-pyrones
作者:Alan R. Katritzky、Zuoquan Wang、Mingyi Wang、C. Dennis Hall、Kazuyuki Suzuki
DOI:10.1021/jo050307m
日期:2005.6.1
A variety of 2,2-dimethyl-6-(2-oxoalkyl)-1,3-dioxin-4-ones 5a-l and the corresponding 6-substituted 4-hydroxy-2-pyrones 3a-l were prepared in high yields under mild reaction conditions by the reaction of 2,2,6-trimethyl-1,3-dioxin-4-one 4 with 1-acylbenzotriazoles 9 in the presence of LDA followed by thermal cyclization of 5a-l to 3a-1. Synthesis of novel 6-(1-benzoylalkyl)-2,2-dimethyl-1,3-dioxin-4-ones 12a-c was achieved by alkylation of dioxinone 5a and their subsequent cyclization gave 5-alkyl-4-hydroxy-2-pyrones 13a-c.