Zobrazeno 1 - 10
of 240
pro vyhledávání: '"F. Alderweireldt"'
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 72:797-806
The methyl ketal formation is strongly exothermic (-14,6 Kcal/mole) with cyclohexanone and moderately so with cyclopentanone (-3,5 Kcal/mole) and with cyclobutanone (-2,5 Kcal/mole). An exceptional low reaction entropy is noted for cyclohexanone (-59
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd38c04a483a1d993f01b65c387d62d6
https://doi.org/10.1002/bscb.19630721115
https://doi.org/10.1002/bscb.19630721115
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 71:623-633
The isolation and preparation of several humulinic acid isomers named humulinic acid A, B, C and D is reported. They can be obtained by isomerization of the known degradation product of humulone which is the humulinic acid A of the above series.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d5d5cf6d7b0e44500f690cc0758e962
https://doi.org/10.1002/bscb.19620710916
https://doi.org/10.1002/bscb.19620710916
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 74:629-636
Methyl allohumulinic acid D (I) was isolated after acid treatment of either humulinic A (HAA) or humulinic acid B (HAB). Some specific reductions on this and other humulinic acids are reported. Dihydromethylhumulinic acid D (IV) is described. A new r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88fbc7572ce3337a836fd7dee655f1a1
https://doi.org/10.1002/bscb.19650741115
https://doi.org/10.1002/bscb.19650741115
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 73:268-274
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1b053a4d161a3d87ebab2372a300824
https://doi.org/10.1002/bscb.19640730312
https://doi.org/10.1002/bscb.19640730312
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 73:910-920
Humulinic acids C and D have respectively stucture III and IV. The methyl derivative of HAD(2) has structure V. The assignments are based on physical and chemical evidence. A mechanism for the formation of these substances is advanced. The preparatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f29438450c0469f89a419c2bc864e12f
https://doi.org/10.1002/bscb.19640731109
https://doi.org/10.1002/bscb.19640731109
Autor:
M. J. O. Anteunis, F. Alderweireldt
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 73:285-292
A detailed analysis of the proton magnetic resonance (PMR) spectra of humulinic acid A and humulinic B shows that the former is the trans and the the latter the cis form with structures I and II respectively. Evidence is advanced that J trans is smal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1fa86a6303ac516b295d335f049b53f9
https://doi.org/10.1002/bscb.19640730314
https://doi.org/10.1002/bscb.19640730314
Autor:
M. J. O. Anteunis, F. Alderweireldt
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 73:903-909
The dioxolanes of acetophenone and 2,3-butanediol were prepared and the three possible isomers were separated by GLC. Structural assignment was based on physical and spectral behaviour. The magnetic anisotropy effect between cis-1,2- and 1,3-located
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de552eae810f8d47f879b588def9b3c3
https://doi.org/10.1002/bscb.19640731108
https://doi.org/10.1002/bscb.19640731108
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 73:275-284
Chemical evidence shows that humulinic acids A and B (1) are cis-trans isomers, corresponding to structure I and II or vice-versa.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71925b252c74d46779a7460c93cd9e92
https://doi.org/10.1002/bscb.19640730313
https://doi.org/10.1002/bscb.19640730313
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 75:516-523
The hydrogenation products of humulinic acids A and B are described and mechanisms for the reactions are advanced. The isolated 2, 4-diisopentylcyclo-pentane-1, 3-dione (X), trans- 1, 3-diisopentyl cyclopentane (XV) and 2, 5-diiso-pentyl-2-cyclopente
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dab9409cee090c8a08ff1e50472eb419
https://doi.org/10.1002/bscb.19660750710
https://doi.org/10.1002/bscb.19660750710
Autor:
M. Anteunis, F. Alderweireldt
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 73:889-897
The P.M.R. spectra of 2,2,4-trimethyl-1,3-dioxolane and both cis and trans 2,4-dimethyl-1,3-dioxolane are qualitatively analysed. The magnetic anisotropy of a methylgroup causes an upfield shift of the cis-γ protons of about 0,15 ppm, and an analogo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18c4a97ddb2e2d627f157ee98f63d17f
https://doi.org/10.1002/bscb.19640731106
https://doi.org/10.1002/bscb.19640731106