Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Rüdiger Stieglitz"'
Publikováno v:
ARKIVOC, Vol 2012, Iss 3, Pp 442-456 (2012)
Externí odkaz:
https://doaj.org/article/b502ef1ff0e34b308b9cc31512b53965
Publikováno v:
Zeitschrift für Naturforschung B. 74:913-924
From acetone and the orthoamide of phenylpropiolic acid (21b) N,N-dimethyl-phenylpropiolic acid amide (24) is formed. In contrast, the reaction of chloroacetone (28) with 21b results in the vinylogous guanidinium chloride 29. Unexpectedly, the Bircke
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fa84294ef25c32297ae0542f4017232
https://doi.org/10.1515/znb-2019-0077
https://doi.org/10.1515/znb-2019-0077
Publikováno v:
Zeitschrift für Naturforschung B. 74:925-938
The 1,1-bis(dimethylamino)-1,3-butadienes (keten aminals) 11a–l are prepared from orthoamide derivatives of alkyne carbonxylic acids 9b, d, e, i and CH2-acidic compounds 10a–c, f–h, k, o. The C-silylated orthoamide derivative 9c shows an ambiva
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b95b269be925e36d7cba85062e6342f
https://doi.org/10.1515/znb-2019-0078
https://doi.org/10.1515/znb-2019-0078
Publikováno v:
Synthesis. 44:3090-3094
Orthoamides of six alkynecarboxylic acids, possessing reactive substituents in 3-position, are transformed by elemental iodine to the corresponding vinylogous guanidinium iodides. The constitution of two of the iodides was established by crystal-stru
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76e2671b1cb014899bc6ce264e9fba99
https://doi.org/10.1055/s-0032-1316991
https://doi.org/10.1055/s-0032-1316991
Publikováno v:
ARKIVOC, Vol 2012, Iss 3, Pp 442-456 (2012)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37b7cc65199506c0140fd6328d058e69
https://doi.org/10.3998/ark.5550190.0013.330
https://doi.org/10.3998/ark.5550190.0013.330
Autor:
Jochen Mezger, Kai Edelmann, Rüdiger Stieglitz, Hansjörg Lehmann, Sebastian Ladendorf, Willi Kantlehner, Markus Vettel, Ralf Kreß, Wolfgang Frey
Publikováno v:
Zeitschrift für Naturforschung B. 62:1015-1029
The orthoamide derivatives 4 react with amidines 10 and guanidines 11 to give 4-dimethylaminopyrimidines 12. The 3-dimethylamino-pyrazoles 13a - c can be prepared from orthoamides 4 and hydrazine. The hydrazine derivative 14, whose constitution was e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63edf3a0a8c62f5d3aa442ac45b6030c
https://doi.org/10.1515/znb-2007-0804
https://doi.org/10.1515/znb-2007-0804
Publikováno v:
Zeitschrift für Naturforschung B. 57:399-419
The orthoamide derivatives 1s and 2e were prepared from the guanidinium salt 7a and the appropriate carbanions. Cleavage of the orthoamide 2e with benzoyl chloride affords the amidinium salt 10a, which can be transformed into the amidinium salt 10b b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5a6fcb6314567f3152ecba101c10b187
https://doi.org/10.1515/znb-2002-0406
https://doi.org/10.1515/znb-2002-0406
Publikováno v:
Journal für praktische Chemie. 342:256-268
The formamidinium salts 11a, c as well as the nitrile 12 react with sodiumhydride/dimethylamine in the presence of trimethylborate to give the ortho formic acid amide 3a. The orthoamides 6a and 16 can be prepared from the iminium salts 15 and 14, res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a6bdd1cd187aea646345c1bb0b976329
https://doi.org/10.1002/(sici)1521-3897(200003)342:3<256::aid-prac256>3.0.co
https://doi.org/10.1002/(sici)1521-3897(200003)342:3<256::aid-prac256>3.0.co
Autor:
Kai Edelmann, Ivo C. Ivanov, Markus Vettel, Hansjörg Lehmann, Rüdiger Stieglitz, Willi Kantlehner
Publikováno v:
Journal f�r Praktische Chemie/Chemiker-Zeitung. 340:408-423
Orthoamides. LI. Push-Pull-Butadienes and Heterocycles from Alkyne Carboxylic Acid Orthoamides and CH2-acidic Compounds The acetylides 4b, 4f react with N,N,N′,N′,N″,N″-hexamethylguanidiniumchloride (5) to give the orthoamides 6b, 6f, resp. F
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::16e5e91e0f5afbe5a665046d06a06bc9
https://doi.org/10.1002/prac.19983400503
https://doi.org/10.1002/prac.19983400503
Publikováno v:
Synthesis; 2012, Vol. 44 Issue 19, p3090-3094, 5p