Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Rolf Sigrist"'
Autor:
Rolf Sigrist, Hans-Jürgen Hansen
Publikováno v:
Helvetica Chimica Acta. 97:1165-1175
The oxidation of benzo[a]azulene (4) with commercial MnO2 in dioxane/H2O leads to a number of products in low yield (Table 1). Treatment of 4 with ‘mild’ MnO2 (MnO2/C) in dioxane/5% H2O results in the formation of 10,10′-bibenzo[a]azulene (18)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46270197925d57470787850038ddb77c
https://doi.org/10.1002/hlca.201400079
https://doi.org/10.1002/hlca.201400079
Autor:
Hans-Jürgen Hansen, Rolf Sigrist
Publikováno v:
Helvetica Chimica Acta. 93:1545-1567
The oxidation of 1-(3,8-dimethylazulen-1-yl)alkan-1-ones 1 with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (=4,5-dichloro-3,6-dioxocyclohexa-1,4-diene-1,2-dicarbonitrile; DDQ) in acetone/H2O mixtures at room temperature does not only lead to the corre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a295053361cab3b4687fbc7ecc09a7d8
https://doi.org/10.1002/hlca.201000031
https://doi.org/10.1002/hlca.201000031
Autor:
Rolf Sigrist, Hans-Jürgen Hansen
Publikováno v:
Helvetica Chimica Acta. 93:1568-1582
The 1-(3-methylazulen-1-yl)alkan-1-ones, when oxidized with excess 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (=4,5-dichloro-3,6-dioxocyclohexa-1,4-diene-1,2-dicarbonitrile; DDQ) in aqueous acetone in the presence of 1-(3-demethylazulen-1-yl)alkan-1-o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0667ef31bc8e0ad85cb588983be73668
https://doi.org/10.1002/hlca.201000032
https://doi.org/10.1002/hlca.201000032
Publikováno v:
Helvetica Chimica Acta. 81:2201-2217
The reaction of guaiazulene (4) and dimethyl acetylenedicarboxylate (ADM) in tetralin or toluene, catalyzed by 5 mol-% of trifluoroacetic acid (TFA) at ambient temperature, leads to the formation of the corresponding heptalene-4,5-dicarboxylate 6 and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::08a6be93a275dd3bedda72e402215021
https://doi.org/10.1002/(sici)1522-2675(19981216)81:12<2201::aid-hlca2201>3.0.co
https://doi.org/10.1002/(sici)1522-2675(19981216)81:12<2201::aid-hlca2201>3.0.co
Publikováno v:
Helvetica Chimica Acta. 78:1408-1418
It is shown that the 2-(hydroxymethyl)-1-methylazulenes 6 are being oxidized by activated MnO2 in CH2Cl2 at room temperature to the corresponding azulene-1,2-dicarbaldehydes 7 (Scheme 2). Extension of the MnO2 oxidation reaction to 1-methyl- and/or 3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d1280d4731d81a3db04c3d0d6f62224
https://doi.org/10.1002/hlca.19950780603
https://doi.org/10.1002/hlca.19950780603
Publikováno v:
ChemInform. 26
It is shown that the 2-(hydroxymethyl)-1-methylazulenes 6 are being oxidized by activated MnO2 in CH2Cl2 at room temperature to the corresponding azulene-1,2-dicarbaldehydes 7 (Scheme 2). Extension of the MnO2 oxidation reaction to 1-methyl- and/or 3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a7388eb6a2bc7d4081c5bbd5a370536
https://doi.org/10.1002/chin.199551091
https://doi.org/10.1002/chin.199551091
Publikováno v:
ChemInform. 30
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18e4f23bac35e8586f3d54669df40e25
https://doi.org/10.1002/chin.199911090
https://doi.org/10.1002/chin.199911090
Autor:
Rolf Sigrist, HansJürgen Hansen
Publikováno v:
Helvetica Chimica Acta; Aug2010, Vol. 93 Issue 8, p1545-1567, 23p
Autor:
Rolf Sigrist, HansJürgen Hansen
Publikováno v:
Helvetica Chimica Acta; Aug2010, Vol. 93 Issue 8, p1568-1582, 15p