Zobrazeno 1 - 10
of 94
pro vyhledávání: '"J C Jacobs"'
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 92:1361-1367
The photodimerization product of 7-dehydrocholesterol was found to consist of three isomers to which structures 4b, 5b and 6b are assigned.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c8b33707c191c11c1607de9740ceafb
https://doi.org/10.1002/recl.19730921212
https://doi.org/10.1002/recl.19730921212
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 99:306-311
Triplet-sensitized irradiation of either Vitamin D or transVitamin D establishes a photo-equilibrium between the two isomers, the position of which varies with the triplet energy of the sensitizer. In the presence of oxygen, selective photooxygenatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::30702dea1e0b121baba935b944f17079
https://doi.org/10.1002/recl.19800991003
https://doi.org/10.1002/recl.19800991003
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 96:113-117
Pathways of formation are discussed for the thirteen toxisterols, the isolation and structure determination of which have been dealt with in the preceding article. It is suggested that toxisterols A (C-8 spiro compounds) and C (bicyclo[3.1.0]hexenes)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3a79e27c74d187478e48868ba7131872
https://doi.org/10.1002/recl.19770960406
https://doi.org/10.1002/recl.19770960406
Autor:
Albert M. Brouwer, H. J. C. Jacobs
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 106:48-53
The characteristic NMR and vibrational spectroscopic properties of 1-methylene-2-vinylcyclopropane 1 and some of its derivatives are described and discussed. The exocyclic CC stretching vibration is consistently found at 1745 cm−1. The 1H NMR spect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e5bb3dcfd855375dca858e4597e674df
https://doi.org/10.1002/recl.19871060203
https://doi.org/10.1002/recl.19871060203
Autor:
H. J. C. Jacobs, E. Havinga
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 84:932-941
The rotatory dispersion curves of ergosterol and its three 9,10-isomers (9β;10α;9β,10α) have been measured throughout the absorption band. The compounds show multiple Cotton effect curves in which the fine structure of the corresponding ultraviol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::772142a6574ef5ef336c09803984bb18
https://doi.org/10.1002/recl.19650840713
https://doi.org/10.1002/recl.19650840713
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 106:613-624
The photochemical reactions of a number of 2,5-dialkyl-1,3,5-hexatrienes are described. Variations in the selectivity of the reactions are observed, which can be rationalized by considering differences in the composition of the equilibrium mixture of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7ce1c5b9979836a96bab88c1287fdd3a
https://doi.org/10.1002/recl.19871061203
https://doi.org/10.1002/recl.19871061203
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 90:549-555
3β-Acetoxy-14β-androst-5-en-17-one (7b) has been prepared in five steps from its 14α-isomer 1. The influence of water on the chromic anhydride oxidation of 3β-acetoxy-5α,6β-dichloroandrostan-17-one (2) in acetic acid has been investigated. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c1ea204dad8d873858a1f32e50aafc59
https://doi.org/10.1002/recl.19710900511
https://doi.org/10.1002/recl.19710900511
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 96:104-112
The structures of the “toxisterols”, products formed upon prolonged irradiation of previtamin D and its photoisomers, have been investigated. Irradiations (λ > 300 nm) were carried out both in diethyl ether and in alcoholic solvents under condit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7780f935f3db70acd7f98e2ea68e6d83
https://doi.org/10.1002/recl.19770960405
https://doi.org/10.1002/recl.19770960405
Publikováno v:
Recueil des travaux chimiques des Pays-Bas = Journal of the Royal Netherlands Chemical Society, 111, 138-143. Royal Netherlands Chemical Society
A theoretical and NMR-spectroscopic conformational analysis is presented of the 3-methyl-1,3,5-hexatrienes and of (Z)-3-tert-butyl-1,3,5-hexatriene. It is shown that (E)-3-methyl-1,3,5-hexatriene exists mainly as the tEt rotamer and (Z)-3-methyl-1,3,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97f8133bd7cfcfcf4568e24f33584323
https://doi.org/10.1002/recl.19921110305
https://doi.org/10.1002/recl.19921110305
Autor:
J. C. Jacobs
Comprehensive ManualS'in Pediatrics are designed to broaden the practitioner's clinical scope by providing a wide range of diagnostic and management skills ordi narily considered to be the exclusive domain of the specialists. Although the series as
