Enantioselective 1,6-Conjugate Addition of Dialkylzinc Reagents to Acyclic Dienones Catalyzed by Cu-DiPPAM Complex-Extension to Asymmetric Sequential 1,6/1,4-Conjugate Addition
作者:Magaly Magrez-Chiquet、Marie S. T. Morin、Joanna Wencel-Delord、Sammy Drissi Amraoui、Olivier Baslé、Alexandre Alexakis、Christophe Crévisy、Marc Mauduit
DOI:10.1002/chem.201302649
日期:2013.10.4
CC coupling: DiPPAM 1 and BINAP 2 ligands led to divergent behaviors in the asymmetric conjugateaddition (ACA) of dialkylzincreagents to linear aryldienones, which were applied to the development of a highly selective sequential asymmetric 1,6/1,4‐ACA process (see scheme; Tf = triflate, DBU = 1,8‐diazabicyclo[5.4.0]undec‐7‐ene).
Palladium-catalysed Suzuki–Miyaura couplings of α,β-unsaturated acid derivatives are challenging due to the susceptibility of their CC bonds adjacent to carbonyl groups. In this work, we describe a highly selective C–O activation approach to this transformation using superactive triazine esters and organoborons as coupling partners. 42 α,β-unsaturated ketones with diverse functional groups have been
钯催化的 α,β-不饱和酸衍生物的 Suzuki-Miyaura 偶联具有挑战性,因为它们的 C C 键与羰基相邻。在这项工作中,我们描述了一种使用超活性三嗪酯和有机硼作为偶联伙伴来实现这种转化的高选择性 C-O 活化方法。用该方法制备了 42 种具有不同官能团的 α,β-不饱和酮。机理研究表明,三嗪激活 C-O 键和稳定催化剂与底物之间的非共价相互作用的双重功能对于反应的成功至关重要。该方法的效率、功能组兼容性和独特的机制使其成为经典方法的有价值的替代品。
Dev, Journal of the Indian Chemical Society, 1956, vol. 33, p. 703,706
作者:Dev
DOI:——
日期:——
REE, TEUNIS VAN, S. AFR. J. CHEM., 42,(1989) N, C. 139-145