Copper Catalyzed C−H Functionalization for Direct Mannich Reactions
摘要:
A protocol for a practical and direct addition of alpha- and gamma-alkyl azaarenes to N-sulfonyl aldimines has been developed. Copper salts act as efficient Lewis acid catalysts for direct Mannich-type reactions providing a mild and fast access to various functionalized heterocycles.
PD(II)-CATALYZED ENANTIOSELECTIVE BETA-METHYLENE C(SP3)-H BOND ACTIVATION
申请人:The Scripps Research Institute
公开号:EP3440056A2
公开(公告)日:2019-02-13
[EN] Pd(II)-CATALYZED ENANTIOSELECTIVE BETA-METHYLENE C(sp3)-H BOND ACTIVATION<br/>[FR] ACTIVATION ÉNANTIOSÉLECTIVE CATALYSÉE PAR DU PD(II) DE LA LIAISON C(SP3)-H DU BÊTA-MÉTHYLÈNE
申请人:SCRIPPS RESEARCH INST
公开号:WO2017165304A2
公开(公告)日:2017-09-28
Chiral acetyl-protected aminoethyl quinoline (APAQ), pyridine and imazoline ligands are disclosed that enable Pd (II)-catalyzed enantioselective arylation or heteroarylation of ubiquitous prochiral β-methylene C-H bonds of aliphatic amides offers an alternative disconnection for constructing β-chiral centers. Systematic tuning of the ligand structure reveals that a six-membered instead of a five-membered chelation of these types of ligands with the Pd(II) is important for accelerating the C(sp3)-H activation thereby achieving enantioselectivity for quinoline and pyridine ligands.