Zobrazeno 1 - 10 of 15 pro vyhledávání: '"Heinz Ross"'
1
Stable 3-Imino-2,3-dihydroindazol-1-yl Radicals
Autor: Ulrich M. Doht, Helmut Quast, Karl-Heinz Ross, Gottfried Philipp
Publikováno v: European Journal of Organic Chemistry. 2011:1891-1895
Oxidation of 2-tert-butyl-3-(tert-butylamino)-2H-indazoles with lead(IV) oxide yields red, stable radicals, which can be distilled under high vacuum and recrystallized. They revert to their precursors on Pd-catalysed hydrogenation. Configuration and
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cf4032e3a8630a16ee8a5217dbbf65aa
https://doi.org/10.1002/ejoc.201001659
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2
1-Acylsemicarbazides by Ring Opening of Iminodiaziridines with Carboxylic Acids: Novel, Expeditious Access to the Azapeptide Motif
Autor: Edeltraud Schmitt, Karl-Heinz Ross, Helmut Quast
Publikováno v: Synthesis. 2010:3358-3362
Carboxylic acids react rapidly and quantitatively with iminodiaziridines to afford 1,2,4-trisubstituted 1-acylsemicarbazides in a multistep sequence. In this way, a carboxy group is readily converted into an azapeptide motif. Broad signals in high-fi
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::96c878473cd3f2e758d36c64c39259a9
https://doi.org/10.1055/s-0030-1257868
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3
Thermal Rearrangements of (Arylimino)diaziridines by Simultaneous Cascades of Pericyclic Reactions
Autor: Karl-Heinz Ross, Gottfried Philipp, Helmut Quast
Publikováno v: European Journal of Organic Chemistry. 2010:2212-2217
(Arylimino)diaziridines rearrange in several cascade reactions at temperatures 60-100 °C. Those that possess unoccupied ortho positions yield fluorescent 3-amino-2H-indazoles and 2-amino-1H-benzimidazoles. If both ortho positions are blocked by meth
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7a4f9d2feaf4821b2cff0554f026f717
https://doi.org/10.1002/ejoc.200901474
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4
Syntheses and15N NMR Spectra of Iminodiaziridines - Ring-Expansions of 1-Aryl-3-iminodiaziridines to 1H- and 3aH-Benzimidazoles, 2H-Indazoles, and 5H-Dibenzo[d,f][1,3]diazepines
Autor: Klaus Banert, Helmut Quast, Manfred Hagedorn, Gottfried Philipp, Karl-Heinz Ross, Harald Hahn
Publikováno v: European Journal of Organic Chemistry. 2009:3940-3952
Iminodiaziridines are synthesized by (i) 1,3-dehydrochlorination with potassium tert-butoxide of N-chloroguanidines, generated in situ from N,N′,N″-substituted guanidines with tert-butyl hypochlorite, and (ii) base-mediated 1,3-elimination of sul
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::951b26428a355c6594257a2ff74f206f
https://doi.org/10.1002/ejoc.200900350
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6
Alkylhydroperoxyde aus Alkylhalogeniden, II
Autor: Heinz Ross, Rudolf Hüttel, Hans Armin Schmid
Publikováno v: Chemische Berichte. 92:699-704
Der Ersatz von organisch gebundenem Chlor und Brom durch den Hydroperoxy-Rest des Wasserstoffperoxyds ist immer dann moglich, wenn das Alkylhalogenid genugend reaktionsfahig im Sinne des SNl-Schemas ist. Komplexbildner konnen die Reaktion erleichtern
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::52293277fe7a7f36e571ce306bf7c48d
https://doi.org/10.1002/cber.19590920323
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8
Zur Darstellung des Cumylhydroperoxyds
Autor: Heinz Ross, Rodolf Hüttel
Publikováno v: Chemische Berichte. 89:2641-2644
Cumylhydroperoxyd last sich in praktisch quantitativer Ausbeute aus 2-Chlor-2-phenyl-propan und hochkonzentriertem Wasserstoffperoxyd darstellen.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a374348c74efc9942ceff60da7517671
https://doi.org/10.1002/cber.19560891126
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