Journal of Molecular Structure p. 315 - 325 (2019)
Update date:2022-08-03
Topics:
Du, Yanting
Wan, Zilu
Chen, Lianqing
Wu, Lamei
A solvent-free solid state method has been developed to synthesize three series of substituted azole derivatives (including 1,3,4-oxadiazole, 1,3,4-thiadiazole and 1,2,4-triazole) in high yields by condensation cyclization of N,N′-bishydrazide derivatives with corresponding cyclization agents, respectively. This general method avoids the use of organic solvents, saves cost and resources, simplifies post-processing and increases reaction rates. These compounds have been fully characterized by 1H NMR, 13C NMR, elemental analysis and MS. The structure of 2,5-di (4-tertbutylphenyl)-1,3,4-oxadiazole has been determined by single crystal X-ray diffraction analysis. The cell parameters are as follows: monoclinic crystal system, Cc space group, a = 18.735 (2) ?, b = 6.3375 (8) ?, c = 16.824 (2) ? and α = γ = 90°; β = 98.292 (2). The electronic absorption and fluorescent properties of these compounds have been systematically investigated for the first time. The relationships between heterocyclic structures and photophysical properties have been discussed. The alteration of emission and absorption wavelengths can be elucidated by hybrid atoms' electronegativity and Substituents' Hammett constants. This approach proposes a novel insight to provide a great number of novel substituted azole derivatives with good photophysical properties by a general green method.
View MoreContact:+86-717-6370352
Address:168 Chengdong Avenue, Yichang, Hubei 443003, P. R.China
Tianjin Dongchang Fine Chemical Industry Co., Ltd.
Contact:+86-22-29894595
Address:Economic Developing Zone, Ji County, Tianjin, China
website:http://www.joyochem.com
Contact:0531-82687998
Address:Factory Building 11, Jinan Comprehensive free trade zone, Shandong, China
website:http://www.mingchem.com/en/index
Contact:0519-85170101-802
Address:Fifth Floor,B of Beihua Buliding,520 Road of Science and Education City,Changwu middle road NO.801,Wujin District,Changzhou,Jiangsu province
Contact:+86-21-61318535
Address:Building 29,No.2139 Xizha Road, Fengxian District, Shanghai
Doi:10.1016/0020-1693(95)04527-9
()Doi:10.1246/bcsj.38.146
(1965)Doi:10.1021/jo00835a086
(1970)Doi:10.1080/07328319608002371
(1996)Doi:10.1021/om9509709
(1996)Doi:10.1016/0957-4166(96)00009-2
(1996)