Zobrazeno 1 - 10
of 15
pro vyhledávání: '"L. H. Chopard‐dit‐Jean"'
Publikováno v:
Helvetica Chimica Acta. 42:772-788
Rac. 2-dehydro-emetine (XV) and rac. 2-dehydro-isoemetine (XVI) have been synthesized in five steps and in good yield from 2-oxo-3-ethyl-9,10-dimethoxy-l, 2,3, 4,6,7-hexahydro-11bH-benzo [a]chinolizine (VII). Homologues and analogues of XV and XVI wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36dbe03e924b20b9f547424c75f57490
https://doi.org/10.1002/hlca.19590420319
https://doi.org/10.1002/hlca.19590420319
Publikováno v:
Helvetica Chimica Acta. 41:1793-1806
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecb26baa394244e07bc377d15d175a28
https://doi.org/10.1002/hlca.19580410634
https://doi.org/10.1002/hlca.19580410634
Publikováno v:
Helvetica Chimica Acta. 41:786-807
The structure of vitamin K2, m. p. 54°, is established as 2-methyl-3-all-trans-farnesylgeranylgeranyl-1,4-naphtoquinone by total synthesis and comparison of the synthetic compound with vitamin K2 from putrefied fish meal. It contains a terpenoid sid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c94a3e3f9809b25cef4c8fef6bc26408
https://doi.org/10.1002/hlca.660410323
https://doi.org/10.1002/hlca.660410323
Autor:
E. Heilbronner, L. H. Chopard‐dit‐Jean
Publikováno v:
Helvetica Chimica Acta. 36:144-160
Das Azulen, die funf isomeren Monomethyl-azulene und einige polyalkyl-substituierte Azulene wurden polarographiert. Alle zeigen ein mehrstufiges Polarogramm, dessen erste Stufe auf den Verbrauch eines einzigen Elektrons bei der Reduktion hinweist. Im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4990c398b84810c7e34fa40112b098fe
https://doi.org/10.1002/hlca.19530360123
https://doi.org/10.1002/hlca.19530360123
Autor:
L. H. Chopard‐dit‐Jean, K. Vogler
Publikováno v:
Helvetica Chimica Acta. 43:279-286
(+)-6-Methyloctanoic (isopelargonic) acid, the fatty acid component of certain polypeptide antibiotics known as polymyxins, has been synthesized by a new route, starting from (−)-2-methylbutanol-(1). The protected dipeptide Nα-(+)-Isopelargonyl-N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb1c661644122516aaa13a6fab0e9054
https://doi.org/10.1002/hlca.19600430137
https://doi.org/10.1002/hlca.19600430137
Publikováno v:
Helvetica Chimica Acta. 42:1283-1292
The isolation of a new quinone from leaves is described. Its structure has been established as an o-dimethylbenzoquinone derivative with a vitamin K2-like isoprenoid side chain of 50 carbon atoms.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::355ceac077e670f96b0d80889d37003e
https://doi.org/10.1002/hlca.19590420424
https://doi.org/10.1002/hlca.19590420424
Publikováno v:
Helvetica Chimica Acta. 37:1872-1885
A semi automatic titration apparatus is described with which microtitrations using about 1 mg of a compound of equivalent weight 300 may be carried out. A statistical analysis of the apparatus using benzoic acid as a test substance has been carried o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0569536bbcf86c07e04284f6ab977b56
https://doi.org/10.1002/hlca.19540370634
https://doi.org/10.1002/hlca.19540370634
Publikováno v:
Helvetica Chimica Acta. 40:1256-1262
11,11′-Di·cis-β-carotene was synthesized awarding to a new scheme C14 + C12 + C14 = C40 by condensing the crystalline C12-di-acetylenic hydrocarbon 3,8-dimethyl-decatriene-(3,5,7)-diyne-(9) at both ends with β-C14-aldehyde followed by dehydratio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b741de43023d4e5c3c25e21f9697586
https://doi.org/10.1002/hlca.19570400517
https://doi.org/10.1002/hlca.19570400517
Publikováno v:
Helvetica Chimica Acta. 45:548-561
The physical properties of 6 vitamin A2 isomers are reported and compared with those of the corresponding vitamin A isomers.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f9282b5accc9c034dc9496d8e5fdfad
https://doi.org/10.1002/hlca.19620450218
https://doi.org/10.1002/hlca.19620450218
Autor:
O. Schindler, R. A. Morton, U. Gloor, F. W. Hemming, Otto Isler, G. M. Wilson, Rudolf Ruegg, J. F. Pennock, Ulrich Schwieter, W. M. F. Leat, O. Wiss, L. H. Chopard‐dit‐Jean
Publikováno v:
Helvetica Chimica Acta. 41:2343-2357
The isolation in pure form of the ubiquinone from pig heart is described. From 750 kg raw material 37 g of pure crystalline material could be obtained. Its structure has been established as that of a 2,3-dimethoxy-5-methyl-benzoquinone derivative wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9f02f3ec2927dc9c9ba22d2d5198807b
https://doi.org/10.1002/hlca.19580410745
https://doi.org/10.1002/hlca.19580410745