Zobrazeno 1 - 10
of 40
pro vyhledávání: '"J. H. Koek"'
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 110:41-45
1,3,7,9-Tetramethyldipyrrolo[1,2-c:2′,1′-f]pyrimidinium methanesulphonate (1) and 2,3,5,6,8,8-hexamethyl-8H-benzo[1,2-b:4,5-b']dipyrrolium methanesulphonate (2) have been prepared via simple reaction schemes. The first has a rigid Z-syn pyrrometh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02567c23b53483c4e20e43d5caaa651a
https://doi.org/10.1002/recl.19911100203
https://doi.org/10.1002/recl.19911100203
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 106:77-84
Three 2,3,22,23,24-pentahydro-21H-biline-1,19-dion-10-enium salts have been prepared: 17,18,22,23-tetramethyl-2,3,22,23,24-pentahydro-21H-biline-1,19-dion-10-enium methanesulphonate (1) with a central flexible structure, its 10-syn-locked 22,23-methy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1e1f120f78da318af3bc1a37f48a7972
https://doi.org/10.1002/recl.19871060303
https://doi.org/10.1002/recl.19871060303
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 106:54-61
The title compounds (1, 2, 5, 6, 7, 13) have been synthesized from the correctly substituted 3,4-dihydro-2,2′-pyrromethen-5[1H]-one (14a…e) and 5′-formyl-3,4-dimethyl-2,2′-pyrromethen-5[1H]-one (15a…d) derivatives via acid-catalyzed condens
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::14de7e08431e73bae555d9a3f47935a1
https://doi.org/10.1002/recl.19871060204
https://doi.org/10.1002/recl.19871060204
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 100:405-408
1,1′-methylene-2,2′-dipyrrolyl ketone can be conveniently prepared in high yield, starting from pyrrole, in three steps. It shows extreme properties that are not observed in comparable rigid ketone systems. These chemical and physical properties
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57fdd70b1ac233793195be5368f436fb
https://doi.org/10.1002/recl.19811001104
https://doi.org/10.1002/recl.19811001104
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 105:360-367
The Z-syn-locked 1,1′-methylene-2,2′-pyrromethen-5(1H]-one 1, prepared in 45% yield in a one-pot reaction from the previously reported 1,1′-methylenebis(pyrrole-5-carbaldehyde) (8), exhibits a brilliant fluorescence with a high quantum yield (1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ff742e7f685ed0808d89fe08250d148
https://doi.org/10.1002/recl.19861051006
https://doi.org/10.1002/recl.19861051006
Publikováno v:
ChemInform. 22
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d7da9e66aee42a306ddebb97a3afa361
https://doi.org/10.1002/chin.199127161
https://doi.org/10.1002/chin.199127161
Publikováno v:
The Activation of Dioxygen and Homogeneous Catalytic Oxidation ISBN: 9781461363071
Thianthrene oxide, described in lit. [W.Adam, J.Am.Chem.Soc 113, 6202–6208 (1991)] as a mechanistic probe for oxidation processes, was applied under aqueous conditions to investigate the behaviour of several bleach active materials of detergent for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::57cc2d4d4f1295161357b535e2a580bd
https://doi.org/10.1007/978-1-4615-3000-8_55
https://doi.org/10.1007/978-1-4615-3000-8_55
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 106:105-112
A facile method of preparing zinc 20-oxaprotoporphyrin-IX dimethyl ester (1) from biliverdin-IXα dimethyl ester has been found. According to NMR spectroscopy, the oxa substituent has a pronounced influence on the properties of the macrocyclic ring s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c93fae2eb7399e46e50f876371ca161f
https://doi.org/10.1002/recl.19871060401
https://doi.org/10.1002/recl.19871060401
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 104:288-291
The reaction of the 3,3′,5,5′-tetramethyl-2,2′-pyrromethen-1,1′-BF2 complex with chlorosulfonic acid and its subsequent neutralisation with sodium bicarbonate yields the titled compound 1, which, in addition to appropriate thermal and photoch
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa71a66ec2fda5aa6b471cd91b190ad7
https://doi.org/10.1002/recl.19851041104
https://doi.org/10.1002/recl.19851041104
Publikováno v:
Chemischer Informationsdienst. 13
1,1′-methylene-2,2′-dipyrrolyl ketone can be conveniently prepared in high yield, starting from pyrrole, in three steps. It shows extreme properties that are not observed in comparable rigid ketone systems. These chemical and physical properties
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d0e8d3bca4430409bdf66af4510f983
https://doi.org/10.1002/chin.198207221
https://doi.org/10.1002/chin.198207221