New sp<sup>3</sup> diphosphine-based rhodium catalysts for the asymmetric conjugate addition of aryl boronic acids to 3-azaarylpropenones
作者:Giorgio Facchetti、Marco Fusè、Tania Pecoraro、Donatella Nava、Isabella Rimoldi
DOI:10.1039/d1nj03634c
日期:——
Different chiral diphosphine ligands were successfully applied to the rhodium catalyzed asymmetric conjugate addition of differently substituted boronic acids to 3-azaarylpropenones containing both pyridinyl and imidazolyl cores. Atropoisomeric (S)-TetraMe-BITIANP (L1) and (S)-BITIANP (L2), together with ligands bearing mixed chirality as in (S,S,Sax)-DIOPHEP (L3), (R,Rax)-ISAPHOS C1 (L4) and (S,Rax
不同的手性二膦配体成功地应用于不同取代的硼酸与含有吡啶基和咪唑基核的 3-氮杂芳基丙烯酮的铑催化不对称共轭加成。Atropoisomeric ( S )-TetraMe-BITIANP ( L1 ) 和 ( S )-BITIANP ( L2 ),连同带有混合手性的配体,如 ( S , S , S ax )-DIOPHEP ( L3 ), ( R , R ax )- ISAPHOS C1 ( L4 ) 和 ( S , R ax , R ax )-ISAPHOS C2 (L5 ),以及含有立体异构 sp 3碳的那些 (( R , R )-ZEDPHOS ( L6 ) 和 ( R , R )-EPHOS ( L8 ) 及其衍生物L7和L9 ) 已被用作手性的来源铑配合物。在最后一类二膦中,新的磷基配体(R,R)-EPHOS(L8)已被合成并首次用作铑配合物中的手性配体,因为它具有催化活性。计算研