Výsledky vyhledávání - "Sylvia Leonhardt"

Orthoamide und Iminiumsalze, LXXXIV [1]. Die Synthese von starken Formylierungsmitteln im präparativen Großmaßstab: Tris(dichlormethyl)amin / Orthoamides and Iminiumsalts LXXXIV [1]. The Synthesis of Strong Formylating Reagents on a Large Preparative Scale: Tris(chloromethyl)amine

Autor: Ivo C. Ivanov, Georg Ziegler, Jochen Mezger, Oliver Scherr, Michael Csiesielski, Alain Goeppert, Markus Wezstein, Sylvia Leonhardt, Willi Kantlehner

Publikováno v: Zeitschrift für Naturforschung B. 69:525-532

Tris(chloromethyl)amine (4) can be prepared by chloromethylation of urotropin with paraformaldehyde or 1,3,5-trioxane and ethyl-trichlorosilane in good yields. Photochlorination of tris(chloromethyl)amine affords tris(dichloromethyl)amine (2). Both r

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5639ec1a722047ee2fe7835d287468b4
https://doi.org/10.5560/znb.2014-3270

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Orthoamide und Iminiumsalze, LXXXV [1]. Die Synthese von starken Formylierungsmitteln im präparativen Großmaßstab: N,N,N',N'- Tetraformylhydrazin und Formyl-aalen [Tris(diformylamino)methan] / Orthoamides and Iminium Salts LXXXV [1]. The Synthesis of Strong Formylating Reagents on a Large Preparative Scale: N;N;N';N'-Tetraformylhydrazine and Formyl-aalen [Tris(diformylamino)methane]

Autor: Georg Ziegler, Oliver Scherr, Markus Vettel, Sylvia Leonhardt, Willi Kantlehner

Publikováno v: Zeitschrift für Naturforschung B. 69:533-540

N;N;N';N'-Tetraformylhydrazine (3) can be pepared in good yields by heating of N;N'-diformylhydrazine (5) with N;N-diformylacetamide (6). The reaction of methanesulfonyl chloride with sodium diformamide (10) in a molar ratio of 2 : 5 in acetonitrile

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https://doi.org/10.5560/znb.2014-3271

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Orthoamide und Iminiumsalze, LXXXIII [1]. Die Synthese von starken Formylierungsmitteln im präparativen Großmaßstab: Triformamid (Triformylamin) / Orthoamides and Iminium Salts LXXXIII [1]. The Synthesis of Strong Formylating Reagents on Large Preparative Scale: Triformamide (Triformylamine)

Autor: Oliver Scherr, Sylvia Leonhardt, Ralf Kreß, Willi Kantlehner, Georg Ziegler

Publikováno v: Zeitschrift für Naturforschung B. 69:332-350

The preparation of sodium diformamide (7) from formamide and sodium methanolate under azeotropic removal of methanol with cyclohexane, or from formamide and sodium ethanolate in ethanol, is described. Diformamide (8) can be prepared by treatment of s

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7ef5ddf3c0c8a41e6ad3436c8b946cf1
https://doi.org/10.5560/znb.2014-3269

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Orthoamide, LXIV [1]. Aromatenformylierungen mit Tris(dichlormethyl)amin und Oligoformylamin-Derivaten in Gegenwart von Supersäuren / Orthoamides, LXIV [1]. Formylation of Aromatic Compounds by Tris(dichloromethyl)amine and Oligoformylamine Derivatives in the Presence of Superacids

Autor: Willi Kantlehner, Ralf Kreß, Jean Sommer, Sylvia Leonhardt, Georg Ziegler, Alain Goeppert, Oliver Scherr

Publikováno v: Zeitschrift für Naturforschung B. 62:995-1014

Tris(dichloromethyl)amine (4), triformamide (1) and tris(diformylamino)methane (“formylaalen”) (2) can be activated by addition of trifluoromethanesulfonic acid. The formylating systems thus formed transform activated aromatic compounds, such as

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https://doi.org/10.1515/znb-2007-0803

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A New Synthesis of N,N′-Bis(dimethylaminomethylene)hydrazine

Autor: Sylvia Leonhardt, Edmont V. Stoyanov, Willi Kantlehner, Jochen Mezger

Publikováno v: Synthesis. 2008:3380-3382

N, N′-Bis(dimethylaminomethylene)hydrazinewas synthesized in a one-step procedure from N, N′-diformylhydrazine and TERT-butoxy-bis(dimethylamino)methane(Bredereck-Simchen reagent) or N, N-dimethylformamide dimethylacetal.

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https://doi.org/10.1055/s-0028-1083192

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Orthoamides. Part 64. Formylation of Aromatic Compounds by Tris(dichloromethyl)amine and Oligoformylamine Derivatives in the Presence of Superacids

Autor: Jean Sommer, Sylvia Leonhardt, Ralf Kress, Willi Kantlehner, Alain Goeppert, Oliver Scherr, Georg Ziegler

Publikováno v: ChemInform. 38

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c04dd2b10f37bc2fd093c68ff4141a39
https://doi.org/10.1002/chin.200747045

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