38201-60-4Relevant academic research and scientific papers
Synthesis and antimicrobial evaluation of thieno[2,3-d]-pyrimidine, thieno[2',3':4,5]pyrimido[1,2-a][1,3,5]triazine, thieno[2,3-d]-1,3-thiazine and 1,2,4-triazole systems
Hemdan, Magdy Mohamed,El-Mawgoude, Heba Kamal Abd
, p. 812 - 818 (2015)
The reaction of lauroyl isothiocyanate with ethyl 2-amino-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate gave ethyl 2-(3-dodecanoylthioureido)-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carboxylate 3. Compound 3 could serve as a main building block in synth
Studies on synthesis and reactions of some new five and six-membered heterocycles bearing 5,6,7,8-tetrahydrobenzo[b]thieno[2,3-d]pyrimidin-4(3H)-ones skeleton
EL-Mahdy, Ahmed F. M.,Hozien, Zeinab A.,Abdelnaser, Shimaa,Mohammed, Ahmed A. K.,El‐Sawaisi, Suliman M.,El-Sherief, Hassan A. H.
, p. 3246 - 3260 (2021/06/16)
Thienopyrimidine derivatives are well-known in various pharmaceutical and biomedical domains. In this work, a series of efficacious and novel strategies for the synthesis of thienopyrimidines starting from 2-amino-3-carboethoxy-4,5,6,7-tetrahydrobenzo[b]thiophene has been developed. The regioselectivity of these synthetic strategies was investigated using density functional theory computation and spectroscopic analysis. In addition, the chemical structures of the new thienopyrimidines and their reaction mechanisms, as well as the biological activity of selected compounds were studied.
Synthesis, characterization and biological studies of some novel thieno[2,3-d]pyrimidines
Al-Taisan, Khulud M.,Al-Hazimi, Hassan M. A.,Al-Shihry, Shar S.
experimental part, p. 3932 - 3957 (2010/09/18)
Several 2-unsubstituted thieno[2,3-d]pyrimidines have been prepared from 2-aminothiophene-3-carboxylic acid esters and their carbonitrile analogs. Some triazolothienopyrimidine and 2-thioxothienopyrimidine representatives have also been synthesized using
Substituted 2-Aminothiopen-derivatives: A potential new class of GluR6-Antagonists
Briel,Rybak,Kronbach,Unverferth
experimental part, p. 69 - 77 (2010/03/24)
In the course of search for new therapeutic agents against epilepsy new inhibitors for the kainate receptor subtypes GluR5 and GluR6 were synthesized. We were able to synthesize new substituted thieno[2,3-d]pyrimidines 3a,b, 4a,b, 5a,b as well as thiophene-3-carboxamides 2a-d and a multitude of substituted 4-methyl-5-phenylthiophene-3-carboxylic acids. All compounds described herein were tested for their antagonistic effect towards the kainate receptor subtypes GluR5 and GluR6. The highest activity was observed for ethyl 2-amino-4-methyl-5-phenylthiophene-3-carboxylate 1c with an IC50 = 0.75 μM at the GluR6 receptor.
A facile one-pot synthesis of 6,7,8,9-tetrahydrobenzo[4,5]thieno[2,3-d]-1, 2,4-triazolo[4,5-a]pyrimidin-5-ones
Gomha, Sobhi M.
scheme or table, p. 213 - 220 (2010/03/26)
The reaction of 2-mercapto-6,7,8,9-tetrahydro-3H-benzo[4,5]thieno[2,3-d] pyrimidin-4-one or its 2-methylthio derivative with hydrazonoyl halides, in the presence of triethylamine, yielded 6,7,8,9-tetrahydrobenzo[4,5]thieno[2,3-d]-1, 2,4-triazolo[4,5-a]pyr
The Dimroth rearrangement: Synthesis and interconversion of isomeric triazolothienopyrimidines
Hamed, Atef A.,El-Ashry, El-Sayed H.,Zeid, Ibrahim F.,Badr, Hesham F.
scheme or table, p. 334 - 339 (2009/05/30)
Triazolo-thieno[3,2-e]pyrimidines obtained by cyclisation of 4-hydrazino-2-(methylthio)thieno[2,3-d]pyrimidine with formic acid, acetic acid, cyanogen bromide and carbon disulfide, and by oxidation of the derived aldehyde hydrazones, are found to be the triazolo[4,3-c] isomers. These [4,3-c] compounds resist isomerisation in acid, but they undergo Dimroth rearrangement to the [1,5-c] isomers under basic conditions. The crystal structure of one such rearranged product, 5-methoxy-8,9,10,11-tetrahydro[1]benzothieno[3,2-e][1,2,4] triazolo[1,5-c]pyrimidine (13b) was confirmed by X-ray analysis.
Synthesis and reactions of some tetrahydrobenzothieno[2,3-d]pyrimidine derivatives with biological interest
El-Sharief,Micky,Shmeiss,El-Gharieb
, p. 439 - 451 (2007/10/03)
Hetetrocyclic substituted rings were prepared from 1-amino-2-carboxamido-4,5,6,7-tetrahydrobenzothiophene and carbon disulphide, chloroacetic acid, or arylidene with different active methylene groups. The antimicrobial activity of synthesized compounds is discussed.
Reaction of Nitriles Under Acidic Conditions. Part III. A Facile Synthesis of Thienopyrimidin-4(3H)-ones
Shishoo, C. J.,Devani, M. B.,Pathak, U. S.,Ananthan, S.,Bhadti, V. S.,et al.
, p. 375 - 380 (2007/10/02)
A variety of thiophene o-aminoesters were reacted with cyanates, thiocyanates, cyanamides, acyl cyanides and α-functionalized acetonitrile derivatives to yield the corresponding 2-substituted thienopyrimidin-4(3H)-ones.
