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.
VB1–Al2O3-catalyzed one-pot condensation of aromatic ketone, aromatic aldehyde, and amide
作者:Min Lei、Lei Ma、Lihong Hu
DOI:10.1016/j.tetlet.2010.07.008
日期:2010.9
A novel and green approach for the efficient synthesis of β-amido ketones using VB1–Al2O3 as a heterogeneous catalyst for the first time from an aldehyde, enolizable ketones, and an amide in EtOH is described. The present methodology has several advantages from the economical and environmental points of view, such as simple procedure, low catalyst loading, high atom economy, and good yields.
描述了一种新颖且绿色的方法,首次使用VB 1 -Al 2 O 3作为多相催化剂从乙醛,可烯化的酮和酰胺在EtOH中有效合成β-酰胺基酮。从经济和环境的观点来看,本方法具有若干优点,例如操作简单,催化剂用量低,原子经济性高和产率高。
One-pot preparation of β-amido ketones/esters in a three-component condensation reaction using magnesium hydrogensulfate as an effective and reusable catalyst
three-component condensation of an aryl aldehyde, an enolizable ketone or β-keto ester, acetyl chloride, and acetonitrile or benzonitrile in the presence of magnesium hydrogensulfate as an active, recoverable, and reusable green catalyst is described for the synthesis of β-amido ketones/esters at room temperature. The key features of this methodology are simplicity, mild reaction conditions, and high
Silica-Supported Perchloric Acid (HClO<sub>4</sub>-SiO<sub>2</sub>): An Efficient Catalyst for the Preparation of<font>β</font>-Amido Carbonyl Compounds Using Multicomponent Reactions
Abstract A new, one-pot, efficient, three-component condensation of benzaldehyde derivatives, enolizable ketones, acetyl chloride, and acetonitrile or benzonitrile in the presence of silica-supportedperchloricacid as an effective catalyst for the synthesis of β-amido carbonyl compounds is described. The present methodology offers several advantages, such as good yields, short reaction times, and
Efficient Synthesis of β-Acetamido Ketones by Silver(I) Triflate-Catalyzed Multicomponent Reactions
作者:Rameshwar Prasad Pandit、Yong Rok Lee
DOI:10.5012/bkcs.2012.33.11.3559
日期:2012.11.20
An efficient one-pot synthesis of $\beta}$-acetamido ketones was accomplished by AgOTf-catalyzed multicomponent reactions of substituted acetophenones with aromatic aldehydes and acid chloride in acetonitrile in high yields. The methods offer several significant advantages of easy handling, mild reaction conditions, and use of effective and non-toxic catalyst.
A new, efficient, one-pot, four-component condensation of benzaldehyde derivatives, acetophenone derivatives, acetyl chloride and acetonitrile in the presence of zincoxide as catalyst is described for the synthesis of β-acetamido ketones.