本文中,我们描述了一种环境友好且具有成本效益的方案,用于合成有价值的呋喃二甲酸二羧酸酯,首先是通过LiBr和K 2 S 2 O 8对易得的呋喃-2-羧酸酯进行α-溴化反应。此外,然后在醇存在下,在钯催化的还原均偶联反应中进行溴化中间产物5-溴呋喃-2-羧酸酯的合成,得到双呋喃基二羧酸酯。该协议的最终产品之一,[2,2'] bifuran-5,5'-二羧酸酯是聚(呋喃二甲酸乙二酯)的重要单体,可用作传统聚对苯二甲酸乙二醇酯的绿色多用途替代聚合物。 (对苯二甲酸乙二醇酯)目前在工业塑料中很常见。
The use of tertiaryamines as surrogates for secondary amines has prominent advantages in terms of stabilization and ease of handling. A Ni-catalyzed transamidation of N-acylsaccharins with tertiary aromatic amines is reported. By using tert-butyl hydroperoxide as the terminal oxidant, this reaction permits selective cleavage of the C(sp3)–N bonds of unsymmetrical tertiary aromatic amines depending
使用叔胺作为仲胺的替代品在稳定性和易于处理方面具有突出的优势。报道了 N-酰基糖精与叔芳香胺的 Ni 催化转酰胺作用。通过使用叔丁基过氧化氢作为末端氧化剂,该反应允许根据烷基取代基的大小选择性裂解不对称叔芳胺的 C(sp3)-N 键。
nBu4NI-catalyzed unexpected amide bond formation between aldehydes and aromatic tertiary amines
A novel and practical amide bond formation method has been developed without the need for any metals. This method provides a novel route for amide bond formation, in the presence of an nBu4NI/TBHP catalyst system, from readily available aldehydes and aromatic tertiary amines.
GONZALEZ NAVARRO MA. M.; PUSTOVAROV V., ICIDCA <BOL.>, 1975, 9, NO 1, 32-38
作者:GONZALEZ NAVARRO MA. M.、 PUSTOVAROV V.
DOI:——
日期:——
Synthesis of [2,2’]Bifuranyl‐5,5’‐dicarboxylic Acid Esters
<i>via</i>
Reductive Homocoupling of
<scp>5‐Bromofuran</scp>
‐2‐carboxylates Using Alcohols as Reductants
<sup>†</sup>
alcohols to afford bifuranyl dicarboxylates. One of the final products in this protocol, [2,2’]bifuran‐5,5’‐dicarboxylicacidesters, are essential monomers of poly(ethylene bifuranoate), which can be served as an green and versatile alternative polymer for traditional poly(ethylene terephthalate) that is currently common in technical plastics.
本文中,我们描述了一种环境友好且具有成本效益的方案,用于合成有价值的呋喃二甲酸二羧酸酯,首先是通过LiBr和K 2 S 2 O 8对易得的呋喃-2-羧酸酯进行α-溴化反应。此外,然后在醇存在下,在钯催化的还原均偶联反应中进行溴化中间产物5-溴呋喃-2-羧酸酯的合成,得到双呋喃基二羧酸酯。该协议的最终产品之一,[2,2'] bifuran-5,5'-二羧酸酯是聚(呋喃二甲酸乙二酯)的重要单体,可用作传统聚对苯二甲酸乙二醇酯的绿色多用途替代聚合物。 (对苯二甲酸乙二醇酯)目前在工业塑料中很常见。
<scp>Copper‐Initiated</scp>
Radical Dearomative 2,
<scp>5‐Alkylarylation</scp>
of Furans via Trihalomethylation/Spirocyclization Cascade
作者:Wenkun Luo、Kai Jiang、Biaolin Yin
DOI:10.1002/cjoc.202200402
日期:2022.12.15
Here is an operable and rare strategy for copper-initiated radicaldearomative 2,5-alkylarylation of furan. By means of this strategy, we realized the dearomatization of furans to construct spirooxindoles with good yield in one-step viatrihalomethylation/spirocyclizationcascade progress.