Palladium- and Platinum-Catalyzed Addition of Aldehydes and Imines with Allylstannanes. Chemoselective Allylation of Imines in the Presence of Aldehydes
Pd(II) or Pt(II) complexes (10 mol %) either at room temperature or at reflux, giving the corresponding homoallylic alcohols 3 in high to good yields. Among the catalysts examined, PtCl2(PPh3)2 gave the best result. No only allyltribitylstannane but also methallyl- and crotyltributylstannane could be utilized in this transition metal catalyzed reaction. Detailed mechanistic studies of the Pd(II)-catalyzed
A convenient and efficient synthesis of substituted quinolines via a simple one-pot reaction of an aniline, an aromatic aldehyde, and an enolizable aliphatic aldehyde in the presence of the iridium catalyst [IrCl2H(cod)]2 under oxygen as an oxidant was developed. The reaction proceeds with Mannich-type imine formation followed by nucleophilic addition to give β-amino aldehydes. Dehydrative cyclization takes place to give dihydroquinoline, which is then dehydrogenated by aerobic oxidation to give 2-aryl-3-alkylquinolines. Dialkylquinolines were obtained by the reaction with anilines and aliphatic aldehydes in good yields.
The first catalytic inverse hydroboration of imines with N‐heterocyclic carbene (NHC) boranes has been realized by means of cooperative organocatalysis and photocatalysis. This catalytic combination provides a promising platform for promoting NHC‐boryl radical chemistry under sustainable and radical‐initiator‐free conditions. The highly important functional‐group compatibility and possible application
Synthesis and crystal structure of the dinuclear cyclopalladated compounds of methyl ( E )-4-(benzylideneamino)benzoate with acetato and chlorido bridge ligands: Study of their splitting reactions with pyridine
作者:Joan Albert、Ramon Bosque、Lucía D’Andrea、José Antonio Durán、Jaume Granell、Mercè Font-Bardia、Teresa Calvet
DOI:10.1016/j.jorganchem.2016.05.003
日期:2016.8
dynamic equilibrium between the cis- and trans-N,Nisomers of compound 5 was shifted to the trans-N,Nisomer. However, the NMR data for solution B suggested that in this solution the equilibrium between the cis- and trans-N,Nisomers of compound 6 was shifted to the cis-N,Nisomer. Interconversion between the trans- and cis-N,Nisomers of compounds 5 and 6 in solutions A and B plausibly proceeded through
(E)-4-(亚苄基氨基)苯甲酸甲酯C 6 H 5 CH N(C 6 H 4 -4-CO 2 Me)与Pd(OAc)2的反应生成双核乙酰桥邻环palpalated化合物[Pd C 6 ħ 4 CH ñ(C 6 H ^ 4 -4-CO 2 Me)的-κ ç邻,κ ñ }] 2(μ-OAC)2(1)。化合物[Pd C 6 H 4 CH N(C 6 H 4-4-CO 2 Me)的-κ Ç邻,κ Ñ }] 2(μ-Cl)的2(2)和[钯C 6 H ^ 4 CH Ñ(C 6 H ^ 4 -4-CO 2 Me)的-κ ç邻,κ ñ }(PY)(X)] [ 3(X = OAc); 还制备了4(X = Cl)],并通过取代反应以高产率分离。化合物3和4的CDCl 3溶液中的1 H和13 C 1 H} NMR显示,他们包括混合物的反式-和顺- Ñ,Ñ异构体。吡啶的加入d 5至溶液1和2在CDCl 3中的摩尔比吡啶d
Unprecedented highly chemoselective allylation of imines in the presence of aldehydes via a palladium catalysed allylstannane reaction