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1.
Navabeh Nami Masoumeh Hosseinzadeh Ehteram Rahimi 《Phosphorus, sulfur, and silicon and the related elements》2013,188(10):2438-2442
The reaction of 4-oxo-2-(2-oxo-1,2-dihydroindol-3-ylidene)hydrazone-1,3-thiazin-6-methyl carboxylate 2 with hydrazine hydrate in methanol gave 4-oxo-2-(2-oxo-1,2-dihydroindol-3-ylidene)hydrazone-1,3-thiazin-6-carbonylhydrazine 3. Furthermore, the reaction of 3 with carbon disulfide and then hydrazine hydrate afforded 3-[6-(4-amino-5-thioxo-4,5-dihydro-1H-1,2,4-triazol-3-yl)-4-oxo-1,3-thiazin-2-yl] hydrazone-1,3-dihydroindol-2-one 5. the latest reacted with DMAD to give {6-hydroxy-3-[4-oxo-2-(2-oxo-1,2-dihydroindol-3-ylidene)hydrazone-1,3-thiazin-6yl]-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazin-7-ylidene}methoxycarbonylmethylene 6. 相似文献
2.
V. D. Dyachenko A. A. Nikishin I. E. Dyachenko 《Russian Journal of Organic Chemistry》2011,47(8):1214-1221
The reaction of ethyl isopropylidenecyanoacetate with ethyl 3-amino-3-thioxopropanoate gave rise to ethyl 4,4-dimethyl-6-oxo-2-thioxo-5-cyanopiperidine-3-carboxylate
whose alkylation provided ethyl 2-benzylsulfanyl-4,4-dimethyl-6-oxo-5-cyano-1,4,5,6-tetrahydropyridine-3-carboxylate, ethyl
5-benzyl-2-benzylsulfanyl-4,4-dimethyl-6-oxo-5-cyano-1,4,5,6-tetrahydropyridine-3-carboxylate, and ethyl 7,7-dimethyl-5-oxo-6-cyano-3,5,6,7-tetrahydro-2H-thiazolo[3,2-a]pyridine-8-carboxylate. 相似文献
3.
The reaction of 2-chloro-3-oxo-3,4-dihydro-2H-1,4-benzothiazines with ‘push-pull’ enamines was investigated. The reaction with the enamines occurs at the β-carbon atom in the presence of a small excess of triethylamine. As a result, a set of 3-oxo-3,4-dihydro-2H-1,4-benzothiazin-2-yl derivatives of 1,3-dicarbonyl compounds and benzothiazinone spiro derivatives was prepared. On acidic hydrolysis of ethyl 2-ethyl-3-(methylimino)-2-(3-oxo-3,4-dihydro-2H-1,4-benzothiazin-2-yl)butanoate, a new rearrangement affording ethyl 11-ethyl-2,3-dimethyl-4-oxo-2,3,4,5-tetrahydro-1H-2,5-methano-6,1,3-benzothiadiazocine-11-carboxylate was discovered. A plausible mechanism and factors influencing the course of the reaction are discussed. 相似文献
4.
在复杂的天然产物合成和生物合成中,醇醛缩合反应是一类重要的碳-碳键形成反应.不对称催化直接Aldol反应由于其原子经济性,操作简捷,符合绿色化学的要求等,成为近年来不对称合成研究的热点之一. 相似文献
5.
[reaction: see text] By combining a Ugi four-component reaction of isocyanides, phosphonoacetic acids, primary amines, and glyoxals or alternatively 3-keto aldehydes with a subsequent Wittig ring-closing reaction (using the Horner/Wadsworth/Emmons variant (HWE)), highly substituted 5-oxo-2,5-dihydro-1H-pyrrole-2-carboxylic acid amides and 6-oxo-1,2,3,6-tetrahydro-pyridine-2-carboxylic acid amides can be assembled, respectively. The corresponding tandem of a Passerini reaction on 3-keto aldehydes and subsequent Wittig ring closure does not afford the expected six-membered 6-oxo-3,6-dihydro-2H-pyran-2-carboxylic acid amides but instead leads to the formation of 4-oxo-pent-2-enoic acid amides via an elimination route. 相似文献
6.
V. V. Bolotov S. N. Kovalenko S. V. Kovaleva V. I. Stepanenko 《Chemistry of Heterocyclic Compounds》2004,40(2):211-213
A method is presented for the synthesis of 3-(2-oxo-1,2-dihydro-3H-indol-3-ylidene)-1,4-dihydroquinoxalin-2-one and 2-(2-oxo-1,2-dihydro-3H-indol-3-ylidene)-2H-1,4-benzoxazin-3(4H)-one by the reaction of ethyl 2-oxoindoline-2-glyoxylate with o-aminophenol and o-phenylenediamine. Proposed reaction mechanisms are presented. 相似文献
7.
The reaction of 2-oxo-3-benzothiazolineacetic acid ( 5 ) and the 5-chloro analogue 6 with thionyl chloride afforded the titled compounds 7 and 8 . The reaction of 7 or 8 with substituted hydrazines, amines or substituted anilines, alcohols and mercaptans furnished the hydrazides 9–14 , acetamides and acetanilides 16–21 , esters 26–30 and thiolesters 31–37 , respectively. Alternate routes for the synthesis of hydrazide 15 , acetamides and acetanilides 22–25 and thiolesters 35–36 are described. The reaction of 2-oxo-3(2H)-benzothi-azolineacetonitrile with thioacetic acid under acidic conditions afforded 2-oxo-3-benzothiazolineethanethio-amide (38). 相似文献
8.
M. I. Medvedeva N. Z. Tugusheva L. M. Alekseeva M. A. Kalinkina V. A. Parshin V. V. Chernyshev V. I. Levina N. B. Grigor’ev A. S. Shashkov V. G. Granik 《Russian Chemical Bulletin》2010,59(12):2247-2258
Amidinohydrazones were prepared by the condensation of 4-arylamino-2-oxo-5-formyl-1,2-dihydropyridine-3-carbonitriles and
4-arylamino-2-oxo-1,2-dihydropyridine-3-carbaldehydes with aminoguanidinium carbonate with the purpose to investigate their
biological activity as putative NO donors. The reaction of 5- и 3-formylpyridones with diguanidinium carbonate was studied.
The formation of stable complexes of 4-arylamino-5-formyl-2-oxo-1,2-dihydropyridine-3-carbonitriles with aminoguanidine and
guanidine was discovered. Amidinohydrazones obtained possess antiinflammatory, antidiabetic, and antihypertensive activities. 相似文献
9.
An efficient route to coumarin derivatives under dual catalysis,an organo- and a Lewis acid catalyst
Gourhari Maiti Rajiv Karmakar Utpal Kayal Rudraksha Nath Bhattacharya 《Tetrahedron》2012,68(42):8817-8822
An efficient reaction of dialkyl acetylenedicarboxylate with various o-hydroxy aromatic aldehydes under dual catalysis with piperidine and FeCl3 in refluxing toluene afforded alkyl 2-oxo-2-(2-oxo-2H-chromen-3-yl) acetates in good to excellent yield. The advantages of this reaction include the use of easily available starting materials, one-pot reaction, mild reaction conditions and operational simplicity. 相似文献
10.
K.S. Levchenko K.A. Chudov E.V. Zinoviev K.A. Lyssenko D.U. Demin N.O. Poroshin P.S. Shmelin E.P. Grebennikov 《Tetrahedron letters》2018,59(29):2788-2792
New 4-oxo-2-vinyl-4H-chromene-3-carbonitrile derivatives have been synthesized by the Knoevenagel reaction of 2-methyl-4-oxo-4H-chromene-3-carbonitrile with aromatic and heteroaromatic aldehydes. Spectral properties of the obtained compounds have been studied. 相似文献
11.
In reaction of oxidation of 1-(2-pyridyl)3,6,6-trimethyl-4-oxo-4,5,6,7-tetrahydroindazole, the corresponding 4,5-dioxoindazole is obtained, and then 1-(2-pyridyl)-3-methyl-4-carboxy-5-(2-methyl-2-carboxypropyl)pyrazole; in bromination reaction, a series of 5-bromo and 7-bromo derivatives is obtained. From 4,5-dioxoindazole with hydrazides of acids, a series of 4-oxo-5-acylhydrazono derivatives is obtained, and also 1-(2-pyridyl)-3,6,6-trimethyl-4-oxo-5-tosylhydroindazole, which, under the action of caustic, gives the 4-oxo-5-diazo derivative.Riga Technical University, Riga LV-1658. Translated from Khimiya Geterotsiklicheskikh Soerdinenii, No. 3, pp. 351–354, March, 1995. Original article submitted December 29, 1994. 相似文献
12.
5-Aroyl-6-(methylsulfanyl)-2-oxo-1,2-dihydro-3-pyridinecarbonitriles and 5-aroyl-4-(methylsulfanyl)-2-oxo-1,2-dihydro-3-pyridinecarbonitriles are synthesized effectively by the reaction of 2-aroyl-3,3-bis(alkylsulfanyl)acrylaldehydes and cyanoacetamide under two different conditions. 相似文献
13.
O. V. Khilya T. A. Volovnenko Yu. M. Volovenko 《Chemistry of Heterocyclic Compounds》2006,42(10):1311-1324
The reaction of 4-oxo-3,4-dihydroquinazolyl-and benzimidazolylacetonitriles with 2-chloro-2-quinolinecarbaldehydes and 1-aryl-5-chloro-3-methyl-1H-pyrazole-4-carbaldehydes
gave the corresponding 3-(2-chloro-3-quinolyl)-2-(4-oxo-3,4-dihydro-2-quinazolyl)-2-propenenitriles and 3-(1-aryl-5-chloro-3-methyl-1H-4-pyrazolyl)-2-hetaryl-2-propenenitriles.
Intramolecular cyclization of these compounds gives 15-oxo-15H-benzo[6,7][1,8]naphthyridino[2,1-b]quinazoline-6-carbonitriles,
1-aryl-3-methyl-11-oxo-1,11-dihydropyrazolo[4′,3′:5,6]pyrido[2,1-b]quinazoline-5-carbonitriles, and 1-aryl-3-methyl-1H-benzo[4,5]imidazo[1,2-a]pyrazolo[4,3-e]pyridine-5-carbonitriles. 相似文献
14.
V. V. Shchepin S. V. Nikitin S. A. Filimonov N. Yu. Russkikh P. S. Silaichev 《Russian Journal of Organic Chemistry》2007,43(10):1432-1436
Zinc enolates generated from dimethyl 4-bromo-2,2-dimethyl-3-oxohexane-1,6-dioate and zinc reacted with aromatic aldehydes giving methyl 2,2-dimethyl-3-oxo-3-(5-oxo-2-aryltetrahydrofuran-3-yl)propanoates. The reaction of zinc enolates obtained from dimethyl 4-bromo-2,2-dimethyl-3-oxoheptane-1,7-dioate and zinc with aromatic aldehydes depending on the synthesis conditions led to the formation either methyl 2,2-dimethyl-3-oxo-3-(6-oxo-2-aryltetrahydropyran-3-yl)propanoates or 3-(5,5-dimethyl-4,6-dioxo-2-aryltetrahydropyran-3-yl)propanoates. The compounds synthesized formed as a single diastereomer of E-configuration. 相似文献
15.
The reaction of 4-oxo-4H-chromen-3-carbaldehydes with coumarin-4-acetic acids under the Perkin conditions follows an interesting pathway that involves aldol reaction and subsequent intramolecular lactonization to afford 2-oxo-2H,5H-pyrano[3,2-c]chromene skeleton. In contrast to chromone-3-carbaldehydes, the same reaction with chromone-2-carbaldehydes yielded only the aldol condensation product. The reaction was performed under thermal and microwave conditions. The reactivity of 2-oxo-2H,5H-pyrano[3,2-c]chromenes in water, alcohol and acetic acid was described. 相似文献
16.
Depending on the ester substituent, diethyl 2-(3-nitro-2-oxo-4-quinolinyl)malonates 2 give upon thermolysis ethyl 2-(3-nitro-2-oxo-4-quinolinyl)acetates 4, whereas dimethyl 2-(3-nitro-2-oxo-4-quinolinyl)-malonates 3 cyclize to give 1-methoxycarbonylisoxazolo[3,4-c]quinolin-4(5H)-ones 5. The necessary reaction conditions can be obtained easily with the help of differential scanning calorimetry. 相似文献
17.
Excellent regio- and stereoselectivity during nitrile addition to dienylium-Fe(CO)(3) can be achieved with perchlorate salts, allowing the preparation of the 1-oxo- and 3-oxo-2-azaspiro[5.5]undecane ring systems. The phthalimide complex 2 was prepared in high yield by Mitsunobo reaction. 相似文献
18.
I. A. Strakova A. Ya. Strakov É. Yu. Gudrinietse N. I. Sikht 《Chemistry of Heterocyclic Compounds》1974,10(9):1099-1101
The conditions for the formation of amides of 4-keto acids, 2-oxo-5-hydroxypyrrolidlnes, 2-oxo-2,3-dihydropyrroles, or 2-oxo-5-aminotetrahydrofurans by reaction of a Δβ,γ-butenolide with primary amines were determined. The reaction with primary aliphatic amines — benzylamine and methylamine — in ethanol gives 2-oxo-5-hydroxypyrrolidines, while reaction with benzylamine in benzene gives the amide of a 4-keto acid. 2-Oxo-5-anilinotetrahydrofuran is formed in the reaction with aniline. 相似文献
19.
L. V. Timokhina G. M. Panova L. V. Kanitskaya O. V. Sokol'nikova D. -S. D. Toryashinova M. G. Voronkov 《Russian Journal of Organic Chemistry》2001,37(11):1655-1658
Synthetic routes to bis(5,5-dimethyl-3-thioxo-1-cyclohexenyl) sulfide have been studied. The title compound can be obtained by reaction of 3-chloro-5,5-dimethyl-2-cyclohexenethione with sodium thiosulfate and by condensation of 3-mercapto-5,5-dimethyl-2-cyclohexenethione. The reaction of bis(5,5-dimethyl-3-oxo-1-cyclohexenyl) sulfide with hydrogen sulfide and hydrogen chloride yields 3-oxo-3'-thioxobis(5,5-dimethyl-1-cyclohexenyl) sulfide. 相似文献
20.
V. O. Koz’minykh V. I. Goncharov E. N. Koz’minykh 《Russian Journal of General Chemistry》2006,76(7):1041-1047
4-Aryl-2-hydroxy-4-oxo-2-butenic (aroylpyruvic) acid arylamides react with triphenylphosphoranylidenacetic acid esters to form products of Wittig reaction at α-carbonyl group, the 5-aryl-3-arylaminocar-bonyl-5-oxo-3-pentenoic acid esters. Features in structure of the obtained compounds are discussed. 相似文献