Stepwise Formation of 1,3-Diazolium-4-thiolates by Munchnone Cycloadditions: Promising Candidates for Nonlinear Optics

被引:9
|
作者
Cantillo, David [1 ]
Avalos, Martin [1 ]
Babiano, Reyes [1 ]
Cintas, Pedro [1 ]
Jimenez, Jose L. [1 ]
Light, Mark E. [2 ]
Palacios, Juan C. [1 ]
Porro, Rocio [1 ]
机构
[1] Univ Extremadura, Fac Ciencias, QUOREX Res Grp, Dept Quim Organ & Inorgan, E-06006 Badajoz, Spain
[2] Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants, England
来源
JOURNAL OF ORGANIC CHEMISTRY | 2014年 / 79卷 / 09期
关键词
1,3-DIPOLAR CYCLOADDITIONS; THIONATION; THIOISOMUNCHNONES; ISOTHIOCYANATES; MESOIONICS;
D O I
10.1021/jo500349g
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
An improved preparation of mesoionic heterocycles 1,3-diazolium-4-thiolates by [3 + 2] cycloadditions of munchnones with aryl isothiocyanates is reported. The process takes place with high or complete regioselectivity, and fast and clean transformations are observed under microwave heating in DMF. DFT calculations support that this cycloaddition proceeds preferably through a stepwise mechanism. Given the pattern substitution around the mesoionic ring resulting in a push pull system, theoretical estimations predict large hyperpolarizabilities in some cases, which is typical of molecules exhibiting nonlinear optical responses.
引用
收藏
页码:4201 / 4205
页数:5
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