Facile access to 3,5-symmetrically disubstituted 1,2,4-thiadiazoles through phosphovanadomolybdic acid catalyzed aerobic oxidative dimerization of primary thioamides
In the presence of Keggin-type phosphovanadomolybdic acids, e.g., H6PV3Mo9O40, oxidative dimerization of various kinds of primarythioamides including aromatic, heterocyclic, and aliphatic ones efficiently proceeded to give the corresponding 3,5-disubstituted 1,2,4-thiadiazoles in excellent yields.
HYPERVALENT IODINE IN SYNTHESIS. 84. FACILE SYNTHESIS OF 3,5-DISUBSTITUTED 1,2,4-THIADIAZOLES BY OXIDATIVE DIMERIZATION OF THIOAMIDES USING POLYMER-SUPPORTED IODOBENZENE DIACETATE
作者:Dong-Ping Cheng、Zhen-Chu Chen
DOI:10.1081/scc-120005423
日期:2002.1.1
ABSTRACT A facilesynthesis of 3,5-disubstituted 1,2,4-thiadiazoles by oxidative dimerization of thioamides using polymer-supported iodobenzenediacetate has been reported.
Electrochemical Synthesis of 3,5‐Disubstituted‐1,2,4‐thiadiazoles through NH
<sub>4</sub>
I‐Mediated Dimerization of Thioamides
作者:Zi‐Qiang Wang、Xiu‐Jin Meng、Qian‐Yu Li、Hai‐Tao Tang、Heng‐Shan Wang、Ying‐Ming Pan
DOI:10.1002/adsc.201800871
日期:2018.11.5
A electrochemical method for the synthesis of 3,5‐disubstituted‐1,2,4‐thiadiazoles through NH4I‐mediated dimerization of thioamides is reported. Using the inexpensive NH4I as electrolyte and catalyst, this electrosynthesis approach requires no oxidizing agents and enables the convenient production of diverse 1,2,4‐thiadiazoles products. The approach is an example of S−N bond construction through the
The facile and efficient organocatalytic platform for accessing 1,2,4-selenadiazoles and thiadiazoles under aerobic conditions
作者:V.P. Rama Kishore Putta、Raghuram Gujjarappa、Nagaraju Vodnala、Richa Gupta、Prasad P. Pujar、Chandi C. Malakar
DOI:10.1016/j.tetlet.2018.01.063
日期:2018.3
The first organocatalytic approach towards synthesis of rarely explored 1,2,4-selenadiazole and thiadiazole scaffolds have been devised using corresponding carboxamides as substrates. The transformations were realized using two distinct conditions in the presence of catalytic vitamin B3 or thiourea underaerobicconditions. Developed methods overcome the associated limitations of previous reported
TCT-DMSO/[bmim]BF4: A novel promoter system for the synthesis of 3,5-diaryl-1,2,4-thiadiazoles at ambient temperature
作者:Ahmad R. Khosropour、Jalil Noei
DOI:10.1002/jhet.261
日期:2011.1
efficient and practical procedure for direct synthesis of 3,5‐diaryl‐1,2,4‐thiadiazoles by thioamides with 2,4,6‐trichloro‐1,3,5‐triazine (TCT) and dimethylsulfoxide using 1‐butyl‐3‐methylimidazolium tetrafluoroborate as an eco‐friendly reaction medium under ambient temperature is described. This protocol can be considered as a newprocedure for 3,5‐diaryl‐1,2,4‐thiadiazoles synthesis. J. Heterocyclic Chem