Electrosynthesis of Trisubstituted 2-Oxazolines via Dehydrogenative Cyclization of β-Amino Arylketones
摘要:
An electrochemically intramolecular functionalization of C-(sp(3))-H bonds with masked oxygen nucleophiles was developed. With IU as the catalyst and electrolyte, diverse trisubstituted 2-oxazolines were constructed in good to excellent yields. This newly developed electrochemical dehydrogenalive approach features external oxidant-free and additive-free conditions.
I2-Catalyzed C–O Bond Formation and Dehydrogenation: Facile Synthesis of Oxazolines and Oxazoles Controlled by Bases
摘要:
A general method for the synthesis of oxazolines and oxazoles was developed through I-2-catalyzed C-O bond formation and dehydrogenation with the same oxidant, TBHP. By simply tuning reaction bases, either oxazolines or oxazoles were selectively produced from beta-acylamino ketones.
An iodine-mediated oxidative dehydrogenation of β-acylamino ketones has been developed for the synthesis of β-ketoenamides in moderate to good yields. Only Z-isomers are accessed due to the intramolecular H-bonding interaction in the HI-elimination step.
已开发出一种碘介导的 β-酰氨基酮氧化脱氢,用于以中等至良好的产率合成 β-酮烯酰胺。由于 HI 消除步骤中的分子内 H 键相互作用,只能访问 Z 异构体。
Tetrachlorosilane-Zinc Chloride as a New Potent Binary Reagent for One-Pot, Three-Component Synthesis of Mannich-Type Products
作者:Doria S. Badawy、Ebrahim Abdel-Galil、Ezzat M. Kandeel、Wahid M. Basyouni、Tamer K. Khatab
DOI:10.1080/10426500802589907
日期:2009.10.30
A combination of tetrachlorosilane and zinc chloride in dichloromethane as an efficient and ambient binary reagent to promote a one-pot amidoalkylation reaction of enolizable ketones, aromatic aldehydes with acetonitriles, or benzonitrile have been developed. The newly synthesized beta-acetamidoketones 3 and beta-benzamidoketones 5 were obtained in good yields.
I<sub>2</sub>-Catalyzed C–O Bond Formation and Dehydrogenation: Facile Synthesis of Oxazolines and Oxazoles Controlled by Bases
A general method for the synthesis of oxazolines and oxazoles was developed through I-2-catalyzed C-O bond formation and dehydrogenation with the same oxidant, TBHP. By simply tuning reaction bases, either oxazolines or oxazoles were selectively produced from beta-acylamino ketones.
Electrosynthesis of Trisubstituted 2-Oxazolines via Dehydrogenative Cyclization of β-Amino Arylketones
An electrochemically intramolecular functionalization of C-(sp(3))-H bonds with masked oxygen nucleophiles was developed. With IU as the catalyst and electrolyte, diverse trisubstituted 2-oxazolines were constructed in good to excellent yields. This newly developed electrochemical dehydrogenalive approach features external oxidant-free and additive-free conditions.