Synthesis 2021; 53(15): 2656-2664
DOI: 10.1055/a-1499-8865
paper

Facile, Mild-Temperature Synthesis of Metal-Free Phthalocyanines

Fangdi Cong
a   Faculty of Chemistry, Northeast Normal University, Renmin Street No. 5268, Changchun 130024, P. R. of China
b   Tianjin Key Laboratory of Aqua-ecology and Aquaculture, College of Basic Science, Tianjin Agricultural University, Jinjing Road No. 22, Tianjin 300392, P. R. of China
,
Hongzhen Jiang
b   Tianjin Key Laboratory of Aqua-ecology and Aquaculture, College of Basic Science, Tianjin Agricultural University, Jinjing Road No. 22, Tianjin 300392, P. R. of China
,
Xiguang Du
a   Faculty of Chemistry, Northeast Normal University, Renmin Street No. 5268, Changchun 130024, P. R. of China
,
Wei Yang
b   Tianjin Key Laboratory of Aqua-ecology and Aquaculture, College of Basic Science, Tianjin Agricultural University, Jinjing Road No. 22, Tianjin 300392, P. R. of China
,
Shulin Zhang
b   Tianjin Key Laboratory of Aqua-ecology and Aquaculture, College of Basic Science, Tianjin Agricultural University, Jinjing Road No. 22, Tianjin 300392, P. R. of China
› Author Affiliations
We gratefully thank the National Natural Science Foundation of China (20472014), the Jilin Provincial Development and Re-form Commission Project (2019C040), the National Key Research and Development Program of China (2019YFC1605305-03), the Key Project of Tianjin Natural Science Foundation (18JCZDJC97800) and the Open Fund of Tianjin Key Lab of Aquatic Ecology and Aquaculture (TJAE201802), for their support.


Abstract

It is important for the synthesis and research of phthalocyanine compounds for these compounds to be easily obtained at low temperature. We observed that metal-free phthalocyanine was sometimes found in a simple system used to synthesize phthalocyanine precursors at room temperature, and further studies showed that the key to the effective formation of phthalocyanines at low temperature lay in the presence of equal volumes of alcohol and amine, in addition to substrate phthalonitriles and solvents, in the reaction system. A synthetic mechanism was proposed and facile syntheses have been realized, such as the synthesis of tetra-α(β)-nitrophthalocyanines and tetra-α(β)-(4-tert-butylphenoxy)phthalocyanines from the corresponding substituted phthalonitriles at mild temperature (37 °C). The results are significant for the design and synthesis of new phthalocyanine derivatives, and the method is convenient and easy to adopt for general use in standard laboratories.

Supporting Information



Publication History

Received: 25 March 2021

Accepted after revision: 05 May 2021

Accepted Manuscript online:
05 May 2021

Article published online:
25 May 2021

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