已开发了用于合成芳基酮的各种N-甲基-N-甲苯磺酰基酰胺与二芳基硼酸的改进的酰基交叉偶联。在大多数情况下,在3当量的存在下,通过使用1mol%的2,6-二异丙基苯基咪唑基亚甲基和3-氯吡啶共负载的氯化钯作为催化剂,可以以优异的产率获得芳基酮。在回流的THF中,以K 2 CO 3为碱。容易制备且具有成本效益的底物,N-甲基-N-甲苯磺酰胺和二芳基硼酸,以及可商购的催化剂体系,保证了实用和有效地获得芳基酮。
The reaction of 1-acyl-3,5-dimethylpyrazoles 1 with CN compounds was kinetically controlled with syn stereoselectivity through a lithium enolate intermediate using lithium diisopropylamide. In contrast, the anti stereoselective reaction of 1 was caused by the action of diisopropylethylamine in the presence of magnesiumbromide under the thermodynamic control. Reaction of 2-acyl-3-phenyl-l-menthopyrazoles
Nickel-Catalyzed Esterification of Aliphatic Amides
作者:Liana Hie、Emma L. Baker、Sarah M. Anthony、Jean-Nicolas Desrosiers、Chris Senanayake、Neil K. Garg
DOI:10.1002/anie.201607856
日期:2016.11.21
demonstrated that amides can be used in nickel‐catalyzed reactions that lead to cleavage of the amide C−N bond, with formation of a C−C or C−heteroatom bond. However, the general scope of these methodologies has been restricted to amides where the carbonyl is directly attached to an arene or heteroarene. We now report the nickel‐catalyzed esterification of amides derived from aliphatic carboxylic acids
Highly efficient synthesis of aryl ketones by PEPPSI-palladium catalyzed acylative Suzuki coupling of amides with diarylborinic acids
作者:Chen Wang、Lingyun Huang、Fengze Wang、Gang Zou
DOI:10.1016/j.tetlet.2018.05.003
日期:2018.6
An improved acylative cross-coupling of various N-methyl-N-tosyl amides with diarylborinic acids for synthesis of aryl ketones is developed. In most cases, aryl ketones could be obtained in excellent yields by using 1 mol% 2,6-diisopropylphenylimidazolylidene and 3-chloropyridine co-supported palladium chloride as catalyst in the presence of 3 equiv. K2CO3 as base in refluxing THF. The readily prepared
已开发了用于合成芳基酮的各种N-甲基-N-甲苯磺酰基酰胺与二芳基硼酸的改进的酰基交叉偶联。在大多数情况下,在3当量的存在下,通过使用1mol%的2,6-二异丙基苯基咪唑基亚甲基和3-氯吡啶共负载的氯化钯作为催化剂,可以以优异的产率获得芳基酮。在回流的THF中,以K 2 CO 3为碱。容易制备且具有成本效益的底物,N-甲基-N-甲苯磺酰胺和二芳基硼酸,以及可商购的催化剂体系,保证了实用和有效地获得芳基酮。