ChemInform Abstract: Highyl Efficient Thermal Cyclization Reactions of Alkylidene Esters in Continuous Flow to Give Aromatic/Heteroaromatic Derivatives.

ChemInform ◽  
2012 ◽  
Vol 43 (22) ◽  
pp. no-no
Author(s):  
Laszlo Lengyel ◽  
Tibor Zs. Nagy ◽  
Gellert Sipos ◽  
Richard Jones ◽  
Gyoergy Dorman ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Thermal Cyclization ◽  
Cyclization Reactions

Highly efficient thermal cyclization reactions of alkylidene esters in continuous flow to give aromatic/heteroaromatic derivatives

2012 ◽  
Vol 53 (7) ◽  
pp. 738-743 ◽  
Author(s):  
László Lengyel ◽  
Tibor Zs. Nagy ◽  
Gellért Sipos ◽  
Richard Jones ◽  
György Dormán ◽  
...  
Keyword(s):  
Continuous Flow ◽  
Thermal Cyclization ◽  
Cyclization Reactions ◽  
Highly Efficient

ChemInform Abstract: Synthesis and Thermal Cyclization Reactions of Methyl Isocrotonate Derivatives.

ChemInform ◽  
1987 ◽  
Vol 18 (34) ◽  
Author(s):  
N. KAWAHARA ◽  
T. SHIMAMORI ◽  
T. ITOH ◽  
H. TAKAYANAGI ◽  
H. OGURA
Keyword(s):  
Thermal Cyclization ◽  
Cyclization Reactions

scholarly journals Synthesis and thermal cyclization reactions of methyl isocrotonate derivatives.

1987 ◽  
Vol 35 (2) ◽  
pp. 457-467 ◽  
Author(s):  
NORIO KAWAHARA ◽  
TAKAKO SHIMAMORI ◽  
TSUNEO ITOH ◽  
HIROAKI TAKAYANAGI ◽  
HARUO OGURA
Keyword(s):  
Thermal Cyclization ◽  
Cyclization Reactions

Addition-cyclization reactions of ethyl isothiocyanatoacetate with carboxylic acid hydrazides

1987 ◽  
Vol 52 (1) ◽  
pp. 113-119 ◽  
Author(s):  
Miroslav Veverka ◽  
Miroslav Marchalín
Keyword(s):  
Carboxylic Acid ◽  
Sodium Ethoxide ◽  
Cyclization Reaction ◽  
Thermal Cyclization ◽  
Cyclization Reactions ◽  
Effect Of Substituents

Ethyl (3-substituted 5-thioxo-1,2,4-triazolin-4-yl)acetates were prepared by addition-cyclization reaction of ethyl isothiocyanatoacetate with carboxylic acid hydrazides in the presence of sodium ethoxide. Thermal cyclization of the adduct in dimethylformamide afforded 1-acetamido-2-thiohydantoin. The effect of substituents on the cyclization course and the thione-thiol tautomerism are discussed.

Reactions of carbonyl isothiocyanates with enamines of the type CH3-C(NH2)=CH-X

1981 ◽  
Vol 46 (12) ◽  
pp. 3128-3133 ◽  
Author(s):  
Michal Uher ◽  
Dušan Ilavský ◽  
Jozef Foltín ◽  
Katarína Škvareninová
Keyword(s):  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Mass Spectra ◽  
Thermal Cyclization ◽  
Cyclization Reactions

Reactions of carbonyl isothiocyanates with enamines of the type CH3-C(NH2)=CH-X (X = CN, COOC2H5, or COCH3) were investigated. The formation of products of AdN, SN, and cyclization reactions is discussed on the basis of their IR, UV and mass spectra. In one case, the thermal cyclization was followed by differential thermal analysis.

scholarly journals Synthesis of Nitrogen- and Oxygen-Containing Heterocycles by Prins Cyclization in Continuous Flow

Synthesis ◽  
2020 ◽  
Author(s):  
Armando Talavera-Alemán ◽  
Guillaume Dagousset ◽  
Christine Thomassigny ◽  
Jérome Marrot
Keyword(s):  
Continuous Flow ◽  
Flow Chemistry ◽  
Prins Reaction ◽  
Cyclization Reactions ◽  
Prins Cyclization ◽  
Anti Isomer ◽  
Bicyclic Compounds ◽  
Continuous Flow Chemistry

AbstractAza-silyl-Prins and oxa-Prins cyclization reactions in continuous-flow chemistry are described for the synthesis of the corresponding tetrahydropyridines and pyran derivatives, respectively. In particular, the use of pyridine-carboxaldehydes for aza-silyl-Prins reaction led to either a symmetrical triarylmethane or two new bicyclic compounds. 4-Fluorinated-2-substituted tetrahydropyran derivatives were also obtained in the oxa-Prins cyclization with good selectivity in favor of the anti-isomer.

scholarly journals Sulphonated graphene oxide catalyzed continuous flow synthesis of pyrazolo pyrimidinones, sildenafil and other PDE-5 inhibitors

RSC Advances ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 326-330
Author(s):  
Vinay Kumar Sthalam ◽  
Bhushan Mahajan ◽  
Purushotham Reddy Karra ◽  
Ajay K. Singh ◽  
Srihari Pabbaraja
Keyword(s):  
Graphene Oxide ◽  
Continuous Flow ◽  
Cyclization Reactions ◽  
Flow Synthesis

Sulphonated graphene oxide was used for cascade condensation and cyclization reactions towards accessing substituted pyrazolo pyrimidinones.

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