ChemInform Abstract: A STUDY OF PERISELECTIVITY IN THE THERMAL CYCLIZATION REACTIONS OF DIENE-CONJUGATED DIAZO COMPOUNDS: 1,7-CYCLIZATION AS A ROUTE TO 3H-1,2-DIAZEPINES AND 1,5-CYCLIZATION LEADING TO NEW REARRANGEMENT REACTIONS OF 3H-PYRAZOLES

1985 ◽  
Vol 16 (6) ◽  
Author(s):  
I. R. ROBERTSON ◽  
J. T. SHARP
Keyword(s):  
Diazo Compounds ◽  
Thermal Cyclization ◽  
Cyclization Reactions ◽  
Rearrangement Reactions

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.

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

Enabling iron catalyzed Doyle–Kirmse rearrangement reactions with in situ generated diazo compounds

2017 ◽  
Vol 53 (49) ◽  
pp. 6577-6580 ◽  
Author(s):  
Katharina J. Hock ◽  
Lucas Mertens ◽  
Renè Hommelsheim ◽  
Robin Spitzner ◽  
Rene M. Koenigs
Keyword(s):  
Drug Discovery ◽  
Building Blocks ◽  
Diazo Compounds ◽  
Rearrangement Reactions

Safe rearrangement reactions of sulfides with in situ generated diazo compounds have been developed. Transient generation of, for example, diazo acetonitrile followed by iron catalysed Doyle–Kirmse reaction generates valuable building blocks for drug discovery.

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