Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Bohumil Máca"'
Publikováno v:
Collection of Czechoslovak Chemical Communications. 59:2454-2471
Ripening of WOCl4/Ph4Sn binary catalyst of composition from 1 : 1 to 1 : 4 in benzene and toluene is a complex reaction in which initially homogeneous solution of the catalyst components continually changes to a colloidal solution, and utterly to a s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f451ce9c046495992986eefdd7bcbfdb
https://doi.org/10.1135/cccc19942454
https://doi.org/10.1135/cccc19942454
Publikováno v:
Collection of Czechoslovak Chemical Communications. 59:1420-1429
2,3-Seco-2,3-diacids of the 28-hydroxy-20(29)-lupene and 28-hydroxylupane series (VIIa and VIIb, respectively) and their derivatives VIII - XIV were prepared from 28-acetoxy-20(29)-lupen-3-one (IIIa) and 28-acetoxy-3-lupanone (IIIb), respectively, by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c876f63959c0a37c0b5a64f5899aaf0a
https://doi.org/10.1135/cccc19941420
https://doi.org/10.1135/cccc19941420
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 79:43-53
Phosphonodipeptides containing aminomethylphosphonic and 1-aminoethylphosphonic acids were synthesized by the active ester method using N-hydroxybenztriazole and DCC. Fragmentation in electron ionization mass spectra (EI/MS) of protected phosphonodip
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aaf6a574ee31431480f274762da6e962
https://doi.org/10.1080/10426509308034396
https://doi.org/10.1080/10426509308034396
Publikováno v:
Collection of Czechoslovak Chemical Communications. 58:173-190
Reaction of 3β-acetoxy-21,22-dioxo-18α,19βH-ursan-28,20β-olide (IIIa) and 20β,28-epoxy-21,22-dioxo-19α,19βH-ursan-3β-yl acetate (IIIb) with diazomethane afforded derivatives XII-XIV with spiroepoxide group in position 21 or 22, which were fur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51b3d92a15712fea73dcf6f6f944563f
https://doi.org/10.1135/cccc19930173
https://doi.org/10.1135/cccc19930173
Autor:
Hana Malinová, Bohumil Máca, Eva Klinotová, Jiří Urban, Luděk Vlk, Jiří Protiva, Václav Křeček
Publikováno v:
Collection of Czechoslovak Chemical Communications. 58:2729-2736
Triazene derivatives of estrone and estradiol in position 2 and 4 were prepared. Their reaction with sodium iodide in an acid medium afforded the corresponding iodo derivatives. The 1H, 13C NMR and mass spectra of the compound prepared are discussed.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c628e6407309f4d3fad0bfe52f5d37b0
https://doi.org/10.1135/cccc19932729
https://doi.org/10.1135/cccc19932729
Publikováno v:
ChemInform. 24
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1d434d8c5d56bda06a5866d4dfd7ce1
https://doi.org/10.1002/chin.199324264
https://doi.org/10.1002/chin.199324264
Publikováno v:
ChemInform. 25
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d0771709433205bf1028dc8e8368876
https://doi.org/10.1002/chin.199408277
https://doi.org/10.1002/chin.199408277
Publikováno v:
ChemInform. 25
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a13183f14cbc362f59310bb788503513
https://doi.org/10.1002/chin.199446219
https://doi.org/10.1002/chin.199446219
Publikováno v:
Collection of Czechoslovak Chemical Communications. 54:1012-1018
The title compound was prepared by a three-step synthesis from diacetyltyrosine (XV) and 4-amino-2-iodobenzoic acid (I). Syntheses of acid I and 4-amino-3-iodobenzoic acid (II) have been revised and modified. 1H and 13C NMR spectra of the synthesized
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0131903a36c3adcd71713e6a7bf3043f
https://doi.org/10.1135/cccc19891012
https://doi.org/10.1135/cccc19891012
Publikováno v:
ChemInform. 20
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f1783a6d2a2b39e506219376f3c68387
https://doi.org/10.1002/chin.198931279
https://doi.org/10.1002/chin.198931279