Two Approaches in the Synthesis of Planar Chiral Azinylferrocenes

Two Approaches in the Synthesis of Planar Chiral Azinylferrocenes / I. A. Utepova, O. N. Chupakhin, P. O. Serebrennikova, A. A Musikhina, V. N. Charushin // Journal of Organic Chemistry. - 2014. - Vol. 79, № 18. - P. 8659-8667.

Документ доступен в ЦНБ УрО РАН: 

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Год: 

2014

Связанные персоналии: 

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Рубрики: 

  • Химические науки

Вид издания: 

  • статья из журнала

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Аннотация

Аннотация

Two synthetic routes to the chiral azinylferrocenes (CAFs) 5 and 15, key intermediates for the synthesis of new enantiomerically enriched P,N-ligands, have been compared. The first approach is based on the palladium-catalyzed cross-coupling reaction of halogenated azines with organozinc derivatives of ferrocenes (the Negishi reaction). The second approach exploits a new synthetic methodology, which provides a shorter pathway, through the direct C–H functionalization of aromatics by the C–C coupling of halogen-free (hetero)arenes with lithium ferrocenes bearing stereogenic C and S atoms. The palladium complexes of P,N-ligands have been used as catalysts for the Tsuji–Trost reaction, which proceeds with high enantioselectivity to give allylic substitution products in good yields.