Synthesis of isocoumarins via thallation-olefination of benzoic acids
作者:R. C. Larock、S. Varaprath、H. H. Lau、C. A. Fellows
DOI:10.1021/ja00330a041
日期:1984.9
Par thallation de l'acide benzoique puis alcenylation en presence de PdCl 2 du carboxy-2 phenyl bis-trifluoroacetoxy thallium obtenu, on prepare diverses isocoumarines et dihydro-3,4 isocoumarines
在 PdCl 2 du carboxy-2 苯基双-三氟乙酰氧基铊 obtenu 存在下进行部分 thallation de l'acide benzoique puis alcenylation,制备不同的异香豆素和二氢-3,4 异香豆素
Assembly of 3-Substituted Isocoumarins via a CuI-Catalyzed Domino Coupling/Addition/Deacylation Process
作者:Shangjun Cai、Fei Wang、Chanjuan Xi
DOI:10.1021/jo2026433
日期:2012.3.2
An efficient strategy for the synthesis of a variety of 3-substitutedisocoumarins has been developed. The reaction proceeded from o-halobenzoic acids and 1,3-diketones via a copper(I)-catalyzed domino reaction in DMF under the action of K3PO4 at 90–120 °C without a ligand to afford the corresponding 3-substitutedisocoumarin derivatives in good to excellent yields. o-Halobenzoic acids could be o-iodobenzoic
已经开发了用于合成多种3-取代的异香豆素的有效策略。该反应由邻卤代苯甲酸和1,3-二酮经DMF中的铜(I)催化的多米诺反应,在K 3 PO 4的作用下于90-120°C下进行,没有配体,得到相应的3-取代的异香豆素衍生物的收率为好至极好。邻卤代苯甲酸可以是邻碘苯甲酸,邻溴苯甲酸和邻氯苯甲酸衍生物。1,3-二酮可以是烷基和芳基取代的1,3-二酮。
Cp*Ir<sup>III</sup>-Catalyzed Oxidative Coupling of Benzoic Acids with Alkynes
作者:Daniel A. Frasco、Cassandra P. Lilly、Paul D. Boyle、Elon A. Ison
DOI:10.1021/cs400656q
日期:2013.10.4
Cp*Ir(III) complexes have been shown to catalyze the oxidative coupling of benzoic acids with alkynes in methanol at 60 °C to form a variety of isocoumarins. The use of AgOAc as an oxidant was required to facilitate significant product formation. Alkyl alkynes were shown to be more reactive substrates than aryl alkynes, and a number of functional groups were tolerated on benzoic acid. Combined mechanistic
A new protocol for the synthesis of polysubstituted isocoumarins from 2-iodobenzoic acid and beta-diketone compounds has been developed. The occurrence of C-arylation cyclization reaction in transition-metal-free systems and ortho-induced substrates has been exploited. Reactions using these inexpensive conditions have displayed high functional group tolerance and excellent yields. (c) 2012 Elsevier Ltd. All rights reserved.