A novel fast green method for the preparation of the squaraine dye 3-oxo-4[(1,3,3-trimethyl-3H-indol-1-ium-2-yl)methylene]-2-[(1,3,3-trimethylindolin-2-ylidene)methyl]cyclobut-1-enolate, inner salt

被引：5
|
作者：
Minkovska, Stela [1 ]
Burdzhiev, Nikola [2 ]
Alexiev, Alexi [2 ]
Deligeorgiev, Todor [2 ]
机构：
[1] Bulgarian Acad Sci, Inst Catalysis, Acad G Bonchev St,Bldg 11, Sofia 1113, Bulgaria
[2] Sofia Univ St Kliment Ohridski, Fac Chem & Pharm, 1 Blv J Bourchier, Sofia 1164, Bulgaria
来源：
CHEMICAL PAPERS | 2018年 / 72卷 / 06期
关键词：
Green method; 1,3,3-Trimethyl-2-methyleneindoline; Squaric acid; Ethyl L-lactate; Microwave irradiation; PI-EXTENDED SQUARAINE; ETHYL LACTATE; OPTICAL-PROPERTIES; FLUORESCENCE; ABSORPTION; SOLVENT;
D O I：
10.1007/s11696-018-0398-6
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A novel green method was developed for the preparation of a squaraine dye, on an 8-mmol scale, by microwave irradiation of two equivalents of 1,3,3-trimethyl-2-methyleneindoline with one equivalent squaric acid in the green solvent, ethyl l-lactate. The time required for this green synthesis is only 4 min. The target squaraine dye was isolated in excellent yield (81%) and with high purity.
引用
收藏
页码：1549 / 1552
页数：4
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