New chemistry of diazafulvenium methides: one way to pyrazoles

Mechanism of pyrolysis of 3,3,4,5-tetrasubstituted 1-pyrazolines.

McKinley, James William

January 1969

A series of tetrasubstituted 1-pyrazolines uniquely substituted at all three carbon centers has been...

Synthesis of the new ring system, Pyrazolo[3,4‐d][1,3]diazepine. A novel route for the synthesis of azolo[1,3]diazepines

Acevedo, Oscar L.
Krawczyk, Steven H.
Townsend, Leroy B.

March 1985

A reduction of the nitrile group of 5‐amino‐4‐cyano‐1‐methylpyrazole ( 3 ) has provided the very ver...

Synthetic Protocol toward Fused Pyrazolone Derivatives via a Michael Addition and Reductive Ring Closing Strategy

Parekh, Nikita
Thomas, Joice
John, Jubi
Kusurkar, Radhika
De Borggraeve, Wim M
Dehaen, Wim

January 2014

A new class of pyrazolo[3,4-c]pyridine-3,7-dione and pyrazolo[3,4-d]azepine-3,7-dione scaffolds was ...

New chemistry of diazafulvenium methides: one way to pyrazoles

Melo, Teresa M. V. D. Pinho e
Soares, Maria I. L.
Gonsalves, António M. d'A. Rocha

January 2006

Diazafulvenium methides generated from the solution pyrolysis of pyrazolo[1,5-c][1,3]thiazole-2,2-di...

Microwave-assisted generation and reactivity of aza- and diazafulvenium methides: heterocycles via pericyclic reactions

Soares, Maria I. L.
Melo, Teresa M. V. D. Pinho e

January 2008

Azafulvenium methides and diazafulvenium methides have been generated under microwave irradiation fr...

Azafulvenium methides: new extended dipolar systems

Sutcliffe, O.B.
Storr, R.C.
Gilchrist, T.L.
Rafferty, P.

January 2001

The transient 1-azafulvenium methides 24, 26 and 28 generated by thermal extrusion of sulfur dioxide...

1-Methyl-5-(trifluoromethyl)azafulvenium Methide, an Intermediate ThatUndergoes Reaction through “Unusual”cis-exo-1,3- andtrans-exo-1,7-Cycloadditions

Argüello, Gustavo Alejandro

June 2014

The generation and reactivity of a new 1-methyl-5-(trifluoromethyl)azafulvenium methide are describe...

Unexpected Trifluoromethylated Pyrazoles From Ethyl 2-diazo-4,4,4-trifluoroacetoacetate and 1-diethylamino-prop-1-yne

Guillaume, M.
Declercq, Jean-Paul
Janousek, Z.
Viehe, HG.
Wynants, C.
Tinant, Bernard

January 1994

Ethyl 2-diazo-4,4,4-trifluoroacetoacetate reacts with N,N-diethylamino-prop-1-yne via an unusual pat...

Synthesis and thermal reactivity of 3-benzyl-7-trifluoromethyl-1H,3H-pyrrolo[1,2-c]thiazole-2,2-dioxide

Peláez, Walter José
Pinho e Melo, Teresa M.V.D.

March 2013

The generation and reactivity of 1-benzyl-5-trifluoromethyl-azafulvenium methide are described. Unde...

DIAZAFULVENONES - THERMAL ISOMERIZATIONS AND ELIMINATIONS IN ALKOXYCARBONYL AND ANILINOCARBONYL DERIVATIVES OF IMIDAZOLE

MAQUESTIAU, A
TOMMASETTI, A
PEDREGALFREIRE, C
ELGUERO, J
FLAMMANG, R
WIERSUM, UE
BENDER, H
WENTRUP, C

February 1986

4-Carbonyl-4H-imidazole (10) and 2-carbonyl-2H-imidazole (11) are formed by flash vacuum pyrolysis o...

Pyrolysis of benzotriazoles. 1-Acyl- and 1-alkoxycarbonylbenzotriazoles: Hetero-Wolff rearrangement to N-acyl- and N-alkoxycarbonyl-fulvenimines and free radical routes to cyanocyclopentadienes

Wentrup, Curt
Freiermuth, Beat
Aylward, Nigel

November 2017

The flash vacuum pyrolysis (FVP) of 1H-benzotriazoles is an important and high-yielding source of cy...

Synthesis of Spirobicyclic Pyrazoles by Intramolecular Dipolar Cycloadditions/[1s, 5s] Sigmatropic Rearrangements.

Dimirjian, Christine A
Castiñeira Reis, Marta
Balmond, Edward I
Turman, Nolan C
Rodriguez, Elys P
Di Maso, Michael J
Fettinger, James C
Tantillo, Dean J
Shaw, Jared T

September 2019

The formation of fused pyrazoles via intramolecular 1,3-dipolar cycloadditions of diazo intermediate...

Synthesis of Pyrazoles and Fused Pyrazoles. Novel Synthesis of Pyrano[2,3-c]pyrazole, Thieno[2,3-c]pyrazole and Pyrazolo[3,4-b ]pyridine Derivatives

M. K. A. IBRAHIM
A. H. H. ELGHANDOUR
G. S.M. ABDBL-SAYED
A. S.M. ABDEL FATTAH

March 1997

Department of Chemistry, Faculty of Science, Cairo University, Giza, A. R. Egypt Manuscript receive...

fused pyrazole synthesis by n-n bond formation: The pyrazolo [5,1-b] benzothiazole system

Bates, Dallas K.
Kohrt, Jeffrey T.
Folk, Heather
Xia, Mingde

January 1997

Treatment of (benzothiazol-2-yl)acetone oxime 1 with excess trifluoroacetic anhydride (TFAA) at room...

Comparative studies of the Pschorr reaction in the pyrazole series. Access to the new dibenzo[e,g]pyrazolo[1,5-a][1,3]diazocine system of pharmaceutical interest

F. Meneghetti
G. Bombieri
G. Daidone
B. Maggio

January 2008

The diazonium tetrafluoroborate 11 obtained from 2-amino-N-methyl-N-(1- phenyl-3-methylpyrazol-5-yl)...

Mechanism of pyrolysis of 3,3,4,5-tetrasubstituted 1-pyrazolines.

McKinley, James William

January 1969

A series of tetrasubstituted 1-pyrazolines uniquely substituted at all three carbon centers has been...

Synthesis of the new ring system, Pyrazolo[3,4‐d][1,3]diazepine. A novel route for the synthesis of azolo[1,3]diazepines

Acevedo, Oscar L.
Krawczyk, Steven H.
Townsend, Leroy B.

March 1985

A reduction of the nitrile group of 5‐amino‐4‐cyano‐1‐methylpyrazole ( 3 ) has provided the very ver...

Synthetic Protocol toward Fused Pyrazolone Derivatives via a Michael Addition and Reductive Ring Closing Strategy

Parekh, Nikita
Thomas, Joice
John, Jubi
Kusurkar, Radhika
De Borggraeve, Wim M
Dehaen, Wim

January 2014

A new class of pyrazolo[3,4-c]pyridine-3,7-dione and pyrazolo[3,4-d]azepine-3,7-dione scaffolds was ...

New chemistry of diazafulvenium methides: one way to pyrazoles

Melo, Teresa M. V. D. Pinho e
Soares, Maria I. L.
Gonsalves, António M. d'A. Rocha

January 2006

Diazafulvenium methides generated from the solution pyrolysis of pyrazolo[1,5-c][1,3]thiazole-2,2-di...

Microwave-assisted generation and reactivity of aza- and diazafulvenium methides: heterocycles via pericyclic reactions

Soares, Maria I. L.
Melo, Teresa M. V. D. Pinho e

January 2008

Azafulvenium methides and diazafulvenium methides have been generated under microwave irradiation fr...

Azafulvenium methides: new extended dipolar systems

Sutcliffe, O.B.
Storr, R.C.
Gilchrist, T.L.
Rafferty, P.

January 2001

The transient 1-azafulvenium methides 24, 26 and 28 generated by thermal extrusion of sulfur dioxide...

1-Methyl-5-(trifluoromethyl)azafulvenium Methide, an Intermediate ThatUndergoes Reaction through “Unusual”cis-exo-1,3- andtrans-exo-1,7-Cycloadditions

Argüello, Gustavo Alejandro

June 2014

The generation and reactivity of a new 1-methyl-5-(trifluoromethyl)azafulvenium methide are describe...

Unexpected Trifluoromethylated Pyrazoles From Ethyl 2-diazo-4,4,4-trifluoroacetoacetate and 1-diethylamino-prop-1-yne

Guillaume, M.
Declercq, Jean-Paul
Janousek, Z.
Viehe, HG.
Wynants, C.
Tinant, Bernard

January 1994

Ethyl 2-diazo-4,4,4-trifluoroacetoacetate reacts with N,N-diethylamino-prop-1-yne via an unusual pat...

Synthesis and thermal reactivity of 3-benzyl-7-trifluoromethyl-1H,3H-pyrrolo[1,2-c]thiazole-2,2-dioxide

Peláez, Walter José
Pinho e Melo, Teresa M.V.D.

March 2013

The generation and reactivity of 1-benzyl-5-trifluoromethyl-azafulvenium methide are described. Unde...

DIAZAFULVENONES - THERMAL ISOMERIZATIONS AND ELIMINATIONS IN ALKOXYCARBONYL AND ANILINOCARBONYL DERIVATIVES OF IMIDAZOLE

MAQUESTIAU, A
TOMMASETTI, A
PEDREGALFREIRE, C
ELGUERO, J
FLAMMANG, R
WIERSUM, UE
BENDER, H
WENTRUP, C

February 1986

4-Carbonyl-4H-imidazole (10) and 2-carbonyl-2H-imidazole (11) are formed by flash vacuum pyrolysis o...

Pyrolysis of benzotriazoles. 1-Acyl- and 1-alkoxycarbonylbenzotriazoles: Hetero-Wolff rearrangement to N-acyl- and N-alkoxycarbonyl-fulvenimines and free radical routes to cyanocyclopentadienes

Wentrup, Curt
Freiermuth, Beat
Aylward, Nigel

November 2017

The flash vacuum pyrolysis (FVP) of 1H-benzotriazoles is an important and high-yielding source of cy...

Synthesis of Spirobicyclic Pyrazoles by Intramolecular Dipolar Cycloadditions/[1s, 5s] Sigmatropic Rearrangements.

Dimirjian, Christine A
Castiñeira Reis, Marta
Balmond, Edward I
Turman, Nolan C
Rodriguez, Elys P
Di Maso, Michael J
Fettinger, James C
Tantillo, Dean J
Shaw, Jared T

September 2019

The formation of fused pyrazoles via intramolecular 1,3-dipolar cycloadditions of diazo intermediate...

Synthesis of Pyrazoles and Fused Pyrazoles. Novel Synthesis of Pyrano[2,3-c]pyrazole, Thieno[2,3-c]pyrazole and Pyrazolo[3,4-b ]pyridine Derivatives

M. K. A. IBRAHIM
A. H. H. ELGHANDOUR
G. S.M. ABDBL-SAYED
A. S.M. ABDEL FATTAH

March 1997

Department of Chemistry, Faculty of Science, Cairo University, Giza, A. R. Egypt Manuscript receive...

fused pyrazole synthesis by n-n bond formation: The pyrazolo [5,1-b] benzothiazole system

Bates, Dallas K.
Kohrt, Jeffrey T.
Folk, Heather
Xia, Mingde

January 1997

Treatment of (benzothiazol-2-yl)acetone oxime 1 with excess trifluoroacetic anhydride (TFAA) at room...

Comparative studies of the Pschorr reaction in the pyrazole series. Access to the new dibenzo[e,g]pyrazolo[1,5-a][1,3]diazocine system of pharmaceutical interest

F. Meneghetti
G. Bombieri
G. Daidone
B. Maggio

January 2008

The diazonium tetrafluoroborate 11 obtained from 2-amino-N-methyl-N-(1- phenyl-3-methylpyrazol-5-yl)...

Mechanism of pyrolysis of 3,3,4,5-tetrasubstituted 1-pyrazolines.

McKinley, James William

January 1969

A series of tetrasubstituted 1-pyrazolines uniquely substituted at all three carbon centers has been...

Synthesis of the new ring system, Pyrazolo[3,4‐d][1,3]diazepine. A novel route for the synthesis of azolo[1,3]diazepines

Acevedo, Oscar L.
Krawczyk, Steven H.
Townsend, Leroy B.

March 1985

A reduction of the nitrile group of 5‐amino‐4‐cyano‐1‐methylpyrazole ( 3 ) has provided the very ver...

Synthetic Protocol toward Fused Pyrazolone Derivatives via a Michael Addition and Reductive Ring Closing Strategy

Parekh, Nikita
Thomas, Joice
John, Jubi
Kusurkar, Radhika
De Borggraeve, Wim M
Dehaen, Wim

January 2014

A new class of pyrazolo[3,4-c]pyridine-3,7-dione and pyrazolo[3,4-d]azepine-3,7-dione scaffolds was ...

New chemistry of diazafulvenium methides: one way to pyrazoles

Abstract

Extracted data

New chemistry of diazafulvenium methides: one way to pyrazoles

Abstract

Extracted data

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