A highly regioselective 6-endo-aryl radical cyclisation: stereocontrolled synthesis of trans-octahydroanthracenes
作者:Sitaram Pal、Monika Mukherjee、Debi Podder、Alok K. Mukherjee、Usha Ranjan Ghatak
DOI:10.1039/c39910001591
日期:——
The sterocontrolled synthesis of trans-octahydroanthracenes 3, 11 and 14 through implementation of an efficient and highly regioselective 6-endo-trig-aryl radical cyclisation of the respective 2-(o-bromobenzyl)-1-methylenecyclohexanes 2, 10 and 13, with tri-n-butyltin hydride is reported, along with a single crystal X-ray structure determination of 11.
Pal Sitaram, Mukhopadhyaya Jayanta K., Ghatak Usha Ranjan, J. Org. Chem, 59 (1994) N 10, S 2687-2694
作者:Pal Sitaram, Mukhopadhyaya Jayanta K., Ghatak Usha Ranjan
DOI:——
日期:——
Regioselective Aryl Radical Cyclization. 1. Stereocontrolled Synthesis of Linearly Condensed Hydroaromatic Carbocyclic Systems through 6-endo-Ring Closures
作者:Sitaram Pal、Jayanta K. Mukhopadhyaya、Usha Ranjan Ghatak
DOI:10.1021/jo00089a009
日期:1994.5
The stereocontrolled synthesis of trans-octahydroanthracenes 3, 11a-c, and 14a-c and trans-octahydro-5aH-cyclohepta[b] naphthalene (27) through implementation of an efficient and highly regioselective 6-endo-trig-aryl radical cyclization of the respective 2-(o-bromoaryl)-1-methylenecyclohexanes 2, 10a-c, and 13a-c and 2-(o-bromobenzyl)-1-methylenecycloheptane (41) with tri-n- butyltin-hydride-is described. The radical cyclization of 2-(o-bromobenzyl)-1-methylenecyclopentane (43), in contrast, produced a mixture of the cis- and trans-hexahydro-1H-benz[f]indenes (38) and (37).
Palladium‐Catalyzed Tandem γ‐Arylation/Aromatization of Cyclohex‐2‐En‐1‐One Derivatives: A Route to 3,4‐Dihydroanthracen‐1(2
<i>H</i>
)‐Ones
An intramolecular palladium-catalyzed tandem γ-arylation/aromatization reaction of cyclohex-2-en-1-one derivatives was developed. This work provides a simple and efficient approach for the construction of substituted 3,4-dihydroanthracen-1(2H)-ones in good yields with a broad substrate scope.
开发了分子内钯催化的 cyclohex-2-en-1-one 衍生物的串联 γ-芳基化/芳构化反应。这项工作为构建具有广泛底物范围的高产率取代的 3,4-二氢蒽-1(2 H )-酮提供了一种简单有效的方法。