Carbopalladation of Nitriles: Synthesis of Benzocyclic Ketones and Cyclopentenones via Pd-Catalyzed Cyclization of ω-(2-Iodoaryl)alkanenitriles and Related Compounds
作者:Alexandre A. Pletnev、Richard C. Larock
DOI:10.1021/jo0262006
日期:2002.12.1
An efficient procedure for the synthesis of 2,2-disubstituted benzocyclic ketones by intramolecular carbopalladation of nitriles has been developed. The cyclization of substituted 3-(2-iodoaryl)propanenitriles affords indanones in high yields. The reaction is compatible with a wide variety of functional groups. This methodology has been extended to the synthesis of tetralones and cyclopentenones.
Evolution of an oxidative dearomatization enabled total synthesis of vinigrol
作者:Qingliang Yang、Cristian Draghici、Jon T. Njardarson、Fang Li、Brandon R. Smith、Pradipta Das
DOI:10.1039/c3ob42191k
日期:——
synthetic strategy resulting in a totalsynthesis of vinigrol is presented. Oxidative dearomatization/intramolecular Diels–Alder cycloaddition has served as the successful cornerstone for all of the approaches. Extensive radical cyclization efforts to form the tetracyclic core resulted in interesting and surprising reaction outcomes, none of which could be advanced to vinigrol. These cyclization obstacles
Dihydrobenzofuran and dihydrobenzothiophene 2,4-pentadienoic acid derivatives having selective activity for retinoid X (RXR) receptors
申请人:——
公开号:US20030216570A1
公开(公告)日:2003-11-20
Compounds of the formula
1
where the variables have the meaning defined in the specification, are specific or selective agonists of RXR retinoid receptors.
具有公式1的化合物
其中变量具有规范中定义的含义,是RXR视黄酸受体的特定或选择性激动剂。
Synthesis of the C1–C12 Fragment of Calyculin C
作者:Olga Konstantinova、Ari Koskinen
DOI:10.1055/s-0037-1610387
日期:2019.1
total of twelve different calyculins (A–J) and calyculinamides (A, B and F) have been described, the most abundant (in D. calyx) being calyculins A and C. Herein, we demonstrate a concise route to access the C1–C12 tetraene fragment of calyculin C using transition-metal-catalyzed coupling reactions (Suzuki–Miyaura, Stille, Negishi and Heck) for the key connections. The synthesis starts from propionaldehyde
Unified Approach to Furan Natural Products via Phosphine‐Palladium Catalysis
作者:Violet Yijang Chen、Ohyun Kwon
DOI:10.1002/anie.202015232
日期:2021.4.12
the construction of tetraalkyl furans remains non‐trivial. The prevalence of alkyl groups in bioactive furan natural products, combined with the desirable bioactivities of tetraalkyl furans, calls for a general synthetic protocol for polyalkyl furans. This paper describes a Michael–Heck approach, using sequential phosphine‐palladium catalysis, for the preparation of various polyalkyl furans from readily