Synthesis of 2-mercaptothieno[3,2-d]- and 2-mercaptobenzo[4, 5]thieno[2,3-d]thiazoles

2-Mercaptothieno[3,2-d]- and 2-mercaptobenzo[4, 5]thieno[2,3-d]thiazoles were synthesized by reduction of bis(3,3′-nitro-2,2′-thienyl) and bis(2,2′-nitrobenzo[b]thien-3,3′-yl) disulfides, respectively, with sodium hydrosulfite or sodium sulfide in the presence of carbon disulfide.     

Synthesis of N-Substituted Derivatives of 2-(4-Amino-2-methyl-1H-indol-3-yl)- and 2-(6-Amino-2-methyl-1H-indol-3-yl)acetic Acids

A method was developed for the production of indole compounds containing an amino group at positions 4 and 6 of the benzene ring on the basis of the indolization of the 3-acetylaminophenylhydrazone of ethyl levulinate. A series of derivatives of 2-(4-amino-2-methyl-1H-indol-3-yl)- and 2-(6-amino-2-methyl-1H-indol-3-yl)acetic acids at the 4- and 6-amino group were synthesized.     

4-(1,3,4-噻二唑-2-巯基)苯并[4,5]呋喃[3,2-d]嘧啶类衍生物合成、晶体结构及抗癌活性

从水杨腈出发,经醚化、两次成环、氯化制得4-氯-苯并[4,5]呋喃[3,2-d]嘧啶(5);5与5-取代-2-巯基-1,3,4-噻二唑反应,合成了7个新的含噻二唑的苯并[4,5]呋喃[3,2-d]嘧啶衍生物.其结构经1HNMR,13CNMR,IR和MS表征,培养并测定化合物6a的晶体结构.采用MTT法进行化合物抑制PC3癌细胞体外活性测试,结果表明所合成的化合物具有不同程度的抑制PC3癌细胞活性,其中化合物6b在10μmol?L-1浓度下对PC3的抑制率为89.2%.     

4-氯-2-甲基吡啶并[3,2-d]嘧啶的合成

吡啶并嘧啶类衍生物具有较好的生物活性,4-氯-2-甲基吡啶并[2,3-d]嘧啶是一种重要的医药中间体,已报道的合成方法成本较高且操作繁琐,不适合工业化生产.本文以2-氯-3-硝基吡啶为起始原料,经取代、还原、环合等5步反应得到目标化合物,产物结构经1 H NMR,13C NMR和MS确证,总收率为33％.该路线具有成本...     

Synthesis of 10-(4-methyl-1-piperazinyl)thieno[3,2-b][1,5]benzothiazepines

A series of the title compounds has been synthesized by two alternative methods in order to study their potential neuroleptical activity and to compare it with the pharmacological data already obtained for compounds of other isomeric or related series.     

Synthesis of 10-(4-methyl-1-piperazinyl)thieno[3,2-b][1,5]benzoxazepines

A series of the title compounds has been synthesized starting from methyl 3-hydroxythiophene-2-carboxylate. Its condensation with 2,4-dinitrochlorobenzene provides through compound 4e a way to introduce 7-substituents by means of diazonium salts reactions.     

Synthesis,Crystal Structure and Antitumor Activity of 4-(5-(2,6-Difluorophenyl)-1,3,4-oxadiazol-2-ylthio)-2-(trifluoromethyl)thieno[2,3-d]pyrimidine

The title compound 4-(5-(2,6-difluorophenyl)-1,3,4-oxadiazol-2-ylthio)-2-(trifluoromethyl)thieno[2,3-d]pyrimidine(C_(15)H_5F_5N_4OS_2, Mr = 416.35) was designed and synthesized as antitumor agent, and its structure was determined by ~1H NMR, ~(13)C NMR, MS, elemental analysis and single-crystal X-ray diffraction. The crystal belongs to monoclinic system, space group P2_1/c with a = 9.904(2), b = 10.057(2), c = 16.595(3) ?, β = 100.000(3)°, V = 1627.9(6) ?~3, Z = 4, F(000) = 832, D_c = 1.699 g/cm~3, μ = 0.395 mm~(-1), R = 0.0468 and wR = 0.1255 for 4726 independent reflections(R_(int) = 0.0336) and 2847 observed ones(I 2σ(I)). The in vitro antitumor activity of the title compound was preliminarily evaluated by the standard MTT assay.     

Synthesis and Crystal Structure of 4-Arylamino-6-chloropyrido[3,2-d]pyrimidine

The title compounds 4a～c were synthesized and characterized by IR,NMR and MS.The crystal structure of C16H13ClN4O2·HBr·H2O(I),the quaternary ammonium salt of 4c,was determined by X-ray diffraction analysis.I crystallizes in triclinic,space group P1 with a = 8.3121(8),b = 9.3885(8),c = 13.2903(12),α = 106.788(2),β = 95.204(3),γ = 110.871(2)o,V = 905.81(14)3,Z = 2,C16H16BrClN4O3,Mr = 427.68,Dc = 1.568 g/cm3,F(000) = 432.00,μ = 2.446 mm-1,R = 0.0496 and wR = 0.127.X-ray analysis reveals that C(15) in the BrCH2COOH molecule binds to the N(1) of pyrimidine ring to form the quaternary ammonium salt.Two adjacent I molecules are connected by hydrogen bonds through carboxylate oxygen,water molecule and hydrobromic acid.     

Synthesis and Structure of 5-Aryl-4-[hydroxy(phenyl)methylene]-1-[2-(1H-indol-3-yl)ethyl]pyrrolidine-2,3-diones

Russian Journal of General Chemistry - The reactions of tryptamine with aromatic aldehyde and methyl benzoylpyruvate at room temperature leads to the formation of...     

Synthesis of pyrido[3′,2′:4,5] thieno[3,2-d]pyrimidine derivatives

Pyrido [3′,2′:4,5]thieno[3,2-d] pyrimidine and several of its derivatives have been synthesized.     

Synthesis, Crystal Structure and Biological Activities of 3-[2-（4-Fluoro-phenyl）-ethyl]-5- methyl-4-hydroxyl-4-methyl-7-methylsulfanyl. 3,4-dihydro-pyrido[4,3-d]pyrimidine-8-carbonitrile

The title compound, 3-[2-(4-fluoro-phenyl)-ethyl]-5-methyl-4-hydroxyl-4-methyl- 7-methylsulfanyl-3,4-dihydro-pyrido[4,3-d]pyrimidine-8-carbonitrile, has been prepared and dete- mined by single-crystal X-ray diffraction. The crystal belongs to the triclinic system, space group P1 with a = 6.8754(8), b = 10.2617(12), c = 13.3491(16) , α = 93.163(2), β = 96.704(2), γ = 102.421(2)°, V = 910.35(19) 3, Z = 2, Mr = 370.44, Dc = 1.351 g/cm3, μ = 0.203 mm-1, F(000) = 388, the final R = 0.0573 and wR = 0.1497. X-ray analysis reveals that the pyridine and pyrimidine rings are almost coplanar.     

N-[5-(4-三氟甲基苯基)-1,3,4-噻二唑-2-基]-N′-芳酰基脲的合成、结构及其生物活性

通过2-氨基-5-(4-三氟甲基苯基)-1,3,4-噻二唑与芳酰基异氰酸酯反应,合成了14种新的芳酰基脲,它们的结构用红外光谱、核磁共振氢谱和元素分析进行了表征,并且采用X射线单晶衍射分析方法测定了化合物2l的结构.初步的生物活性试验表明,部分标题化合物具有优良的植物生长调节活性.     

[1]Benzothienopyrimidines. II. Study of the electrophilic substitutions of [1]benzothieno[3,2-d]pyrimidine and [1]benzothieno[3,2-d]pyrimidin-4-(3H)one

The nitration and bromination of both [1]benzothieno[3,2-d]pyrimidin-4(3H)one ( 1 ) and [1]benzothieno-[3,2-d]pyrimidine ( 2 ) has been studied. Nitration of 1 at ?30° afforded a mixture of 8-nitro[1]benzothieno-[3,2-d]pyrimidin-4(3H)one ( 7b ) (70%) and 6-nitro[1]benzothieno[3,2-d]pyrimidin-4(3H)one ( 7a ) (30%). However when the nitration was carried out at 60°, the 6,8-dinitro derivative 8 was the result. On the contrary, the nitration of 2 at ?30° gave a single nitration product, 8-nitro[1]benzothieno[3,2-d]pyrimidine ( 11 ). The bromination of both 1 and 2 gave the corresponding 8-bromo derivatives 10 and 13 . Assignment of structure of all the products was based on ir and nmr spectral studies and on unequivocal syntheses.     

Syntheses, Structure and Biological Activities of 2-（ 1H-Benzo [ 1,2,3 ] triazole-l-yl） -1-（3-methyl-4-bromobiphenyl） - 2- （ 1H-1, 2,4-triazole-1 -yl ） ethanone

Introduction 1,2,4-Triazole derivatives represent an interesting class of heterocyclic compounds[1] and have become the most rapidly expanding group of antifungal compoundswith the advantages of toxicity, high oral bioavailability, and broad spectrum of activity against several fungi, including most yeasts and folanentous fungi[2-4].     

Preparation of reissert compounds derived from the thieno[3,2-c]pyridine,thieno[2,3-d]pyridazine and the thieno[2,3-d]pyrimidine ring systems

The use of tributyltin cyanide, trimethylsilyl cyanide and potassium cyanide in the Reissert reaction is contrasted in the furo[3,2-c]pyridine, thieno[3,2-c]pyridine, thieno[2,3-dpyridazine, and thieno[2,3-d]pyrimidine ring systems.     

Synthesis of 2-mercapto-substituted thieno[2,3-d]thiazoles and ben zothieno[3,2-d] thiazoles

2-Mercaptothieno[2, 3-d]thiazoles were synthesized from bis(2-nitro-3-thienyl) disulfide by successive reduction of, initially, the disulfide bond and the nitro group in the presence of carbon disulfide without isolation of the intermediate 2-nitro-3-mercaptothiophene. 2-Mercaptobenzo-[b]thieno[3, 2-d]thiazole was synthesized by reaction of 3-aminobenzo[b]thiophene hydrochloride with sulfur monochloride and cleavage of the resulting benzo[b]thienothiazothionium chloride with sodium sulfide in the presence of carbon disulfide.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1355–1356, October, 1976.     

Synthesis of pyrimido [4,5-c] pyridazine (4-deazafervenulin), pyrazolo[3,4-d] pyrimidine and 6-(pyrazino-1-yl)pyrimidine derivatives

The synthesis of several pyrimido[4,5-c]pyridazine (4-deazafervenulin) ( 1 ), pyrazolo[3,4-d]-pyrimidine ( 2 ) and 6-(pyrazino-1-yl)pyrimidine ( 9 ) analogs has been accomplished from 6-hydrazinouracil ( 3 ). This compound could not be used as starting material for the preparation of indolo[3,2-c]pyridazino[3,4-d]pyrimidine derivatives ( 8 ) because it yielded the corresponding hydrazones ( 7 ).