Xylose was found as a natural, cheap and efficient organocatalyst for the one-pot synthesis of substituted dihydropyrrol-
2-ones via a four-component domino reaction between amines, dialkyl acetylenedicarboxilates and formaldehyde.
This protocol includes some important aspects like mild reaction conditions, good yields, short reaction times, affordable
procedure, simple work-up and lack of need for column chromatography.
Nano Fe3O4 as a magnetically recyclable, powerful, and stable catalyst for the multi-component synthesis of highly functionalized dihydro-2-oxopyrroles
Abstract A mild and efficient method for the one-pot synthesis of functionalized dihydro-2-oxopyrroles is described via four-component domino reaction of amines, dialkyl acetylenedicarboxylates, and formaldehyde in the presence of super magnetic nano iron oxide (nano Fe3O4) in EtOH at room temperature. The major advantages of the present method are mild and green reaction conditions, high yields, short
摘要 在超磁性纳米氧化铁(纳米Fe 3 O 4)存在下,通过胺,乙炔基二羧酸二烷基酯和甲醛的四组分多米诺反应,描述了一种温和高效的一锅合成官能化二氢-2-氧吡咯的方法。在室温下在乙醇中。本方法的主要优点是温和绿色反应条件,高收率,较短的反应时间,清洁的反应,可磁循环使用的催化剂,原子经济性(63-76%),操作简便且无需柱色谱法。发现该催化剂是可回收的并且可以使用多达六次而不会显着降低其活性。 图形概要
Maltose, A Natural, Efficient and Economical Catalyst for the One-Pot Synthesis of Highly Substituted Dihydropyrrol-2-Ones
Maltose is a natural, economical and very effective catalyst for promotion of the four-component domino reaction between amines, dialkyl acetylenedicarboxylates and formaldehyde to afford substituted dihydropyrrol-2-ones at room temperature. The advantages of this protocol are good yields, short reaction times, low cost, environmentally friendly, simple work-up and lack of need for column chromatography
One-pot four-component domino reaction for the synthesis of substituted dihydro-2-oxypyrrole catalyzed by molecular iodine
作者:Abu T. Khan、Arindam Ghosh、Md. Musawwer Khan
DOI:10.1016/j.tetlet.2012.03.046
日期:2012.5
The synthesis of multi-functionalized dihydro-2-oxypyrrole can be achieved using one-pot four-component domino reaction from dialkylacetylene dicarboxylate, amines, and formaldehyde by employing molecular iodine as catalyst at room temperature. The salient features of the present method are: simple, straightforward, cost-effective, environmentally benign, and no column chromatographic separation is applicable on a broad range of substrates. (C) 2012 Elsevier Ltd. All rights reserved.