β-环糊精是一种绿色且广泛使用的超分子催化剂,已被探索作为一种高效的促进剂,用于无金属一锅多组分合成各种高功能化生物活性杂环部分,2-氨基-4,6-二苯基烟腈和 2,3-二氢喹唑啉-4(1 H )-酮,来自容易获得的前体醛。这些协议的主要努力是在一锅多组分合成中探索这种有机超分子。没有金属催化剂或有毒酸和苛刻的反应条件,优异的官能团耐受性,廉价、绿色和环境安全的方案是这项工作的关键优势。
CuI@Al2O3 catalyzed synthesis of 2-aminonicotinonitrile derivatives under solvent free condition
作者:Manish Rawat、Diwan S. Rawat
DOI:10.1016/j.tetlet.2019.03.048
日期:2019.4
A Green approach for the synthesis of 2-aminonicotinonitriles from oxime acetate as enamine precursor, aldehyde and malononitrile under neat condition without the use of additive in presence of [email protected]2O3 nanocatalyst is reported. Wide substrate scope, high yield in shorter reaction time, avoid the usage of bases/additives with better green chemistry matrices like low E factor and PMI, high
报道了在纯净条件下在[电子邮件保护的] 2 O 3纳米催化剂存在下不使用添加剂的情况下,由乙酸肟作为烯胺前体,醛和丙二腈合成2-氨基烟腈的绿色方法。与文献方法相比,较宽的底物范围,高收率,更短的反应时间,避免使用具有较低E因子和PMI的绿色化学更好的碱/添加剂,原子经济性,碳效率和反应质量效率高的碱/添加剂。[受电子邮件保护] 2 O 3纳米催化剂被回收并再循环了五次,而其催化活性并未显着降低。
Acidic tributyl phosphonium-based ionic liquid: an efficient catalyst for preparation of diverse pyridine systems <i>via</i> a cooperative vinylogous anomeric-based oxidation
作者:Sepideh Jalali-Mola、Morteza Torabi、Meysam Yarie、Mohammad Ali Zolfigol
DOI:10.1039/d2ra04631h
日期:——
In this study, an acidic phosphonium-based ionic liquid, namely tributyl(3-sulfopropyl)phosphonium trifluoroacetate, was designed and synthesized via a facile and green route. From an accurate perspective, the structure of the prepared ionic liquid was investigated using FT-IR, 1H NMR and 13C NMR spectroscopies, and EDX, elemental mapping and TGA/DTG analysis. In this intensive research, catalytic
Divergent Syntheses of 2-Aminonicotinonitriles and Pyrazolines by Copper-Catalyzed Cyclization of Oxime Ester
作者:Qifan Wu、Yan Zhang、Sunliang Cui
DOI:10.1021/ol500094w
日期:2014.3.7
Copper-catalyzed cyclization of an oxime ester toward divergent heterocycle synthesis is reported. Oxime ester serves as an enamine precursor to cyclize with malononitrile and aldehydes for access to 2-aminonicotinonitriles in a one-pot reaction, while cyclizing with N-sulfonylimines leads to synthesis of pyrazolines.
Urease-catalyzed synthesis of aminocyanopyridines from urea under fully green conditions
This is an original work on catalytic performance of urease in organic synthesis which in one-pot dissociation of urea and condensation of the in situ generated ammonia with aldehydes, acetophenones, and malononitrile occurs in water to give 2-amino-3-cyanopyridines. Comparative experiments with ammonium salts supported the enzymatic specify of 0.01 g/mL (50 U/mg) of urease for bio-production of ammonia, while trace amount of heavy metal ions such as Pb2+, Hg2+, and Ag+ inhibit these specific reactions. The scalability and promiscuity of urease facilitate the applicability of the process for biotechnological organic reactions based on ammonia. (C) 2016 Published by Elsevier B.V.
β-Cyclodextrin: a supramolecular catalyst for metal-free approach towards the synthesis of 2-amino-4,6-diphenylnicotinonitriles and 2,3-dihydroquinazolin-4(1<i>H</i>)-one
作者:Bijeta Mitra、Gyan Chandra Pariyar、Pranab Ghosh
DOI:10.1039/d0ra09562a
日期:——
proficient promoter for the metal-free one-pot multi-component synthesis of a vast range of highly functionalized bioactive heterocyclic moiety, 2-amino-4,6-diphenylnicotinonitriles and 2,3-dihydroquinazolin-4(1H)-one, from easily available precursor aldehydes. The main endeavor of these protocols is to explore this organic supramolecule in one-pot multi-component synthesis. Absence of metal catalyst or toxic
β-环糊精是一种绿色且广泛使用的超分子催化剂,已被探索作为一种高效的促进剂,用于无金属一锅多组分合成各种高功能化生物活性杂环部分,2-氨基-4,6-二苯基烟腈和 2,3-二氢喹唑啉-4(1 H )-酮,来自容易获得的前体醛。这些协议的主要努力是在一锅多组分合成中探索这种有机超分子。没有金属催化剂或有毒酸和苛刻的反应条件,优异的官能团耐受性,廉价、绿色和环境安全的方案是这项工作的关键优势。