Stereospecific Intramolecular Arylation of 2- and 3-Pyridyl Substituted Alkylamines via Configurationally Stable α-Pyridyl Organolithiums,Organic Letters

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Stereospecific Intramolecular Arylation of 2- and 3-Pyridyl Substituted Alkylamines via Configurationally Stable α-Pyridyl Organolithiums
Organic Letters ( IF 4.9 ) Pub Date : 2017-01-18 00:00:00 , DOI: 10.1021/acs.orglett.6b03603
Julien Maury _{1,

2} , Wojciech Zawodny ₁ , Jonathan Clayden ₂

Affiliation

Treatment of N′-aryl urea derivatives of enantiomerically enriched α-(2-pyridyl) and α-(3-pyridyl)alkylamines with a base leads to the migration of the N′-aryl substituent from N to C in a ‘nonclassical’ intramolecular nucleophilic aromatic substitution reaction. Both electron-rich and -poor rings migrate successfully. A new quaternary stereogenic center is formed adjacent to the pyridine ring with high stereospecificity, even when the intermediate anion is a presumably planar 2-picolyllithium. Base hydrolysis of the urea gives enantiomerically enriched α-pyridylalkylamines.

中文翻译：

通过构型稳定的α-吡啶基有机锂的2-和3-吡啶基取代的烷基胺的立体特异性分子内芳基化

用碱处理对映体富集的α-（2-吡啶基）和α-（3-吡啶基）烷基胺的N'-芳基脲衍生物会导致N'-芳基取代基从N迁移至C的“非经典”状态分子内亲核芳族取代反应。富电子环和贫电子环均成功迁移。即使当中间阴离子可能是平面的2-甲基吡啶基锂时，在吡啶环附近也会形成一个新的立体立体中心，该中心具有很高的立体特异性。脲的碱水解得到对映体富集的α-吡啶基烷基胺。

更新日期：2017-01-18

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