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Bulbocapnine methyl ether ( 2 ), on treatment with boron halides, affords the aporphine-1,2-diol ( 3 ), the novel aporphines 5 and 6 or the phenanthrene derivative 11 depending on the reaction conditions. 3 can be further transformed into corydine methyl ether ( 4 ); 6 has been converted to corytuberine ( 8 ). Similarly, dehydrobulbocapnine methyl ether 9 was converted to 10 . 相似文献
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Ed. Gerecke 《Zeitschrift für Angewandte Mathematik und Physik (ZAMP)》1960,11(4):335-335
Ohne Zusammenfassung
International Association for Analog Computation
ASICA Association Internationale pour le Calcul Analogique相似文献
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Wenger D Gerecke AC Heeb NV Naegeli H Zenobi R 《Analytical and bioanalytical chemistry》2008,390(8):2021-2029
An in vitro reporter gene assay based on human breast cancer T47D cells (ER-CALUX) was applied to examine the ability of diesel exhaust to induce or inhibit estrogen receptor (ER)-mediated gene expression. Exhaust from a heavy-duty diesel engine was either treated by iron- or copper/iron-catalyzed diesel particulate filters (DPFs) or studied as unfiltered exhaust. Collected samples included particle-bound and semivolatile constituents of diesel exhaust. Our findings show that all of the samples contained compounds that were able to induce ER-mediated gene expression as well as compounds that suppressed the activity of the endogenous hormone 17beta-estradiol (E2). Estrogenic activity prevailed over antiestrogenic activity. We found an overall ER-mediated activity of 1.63 +/- 0.31 ng E2 CALUX equivalents (E2-CEQs) per m(3) of unfiltered exhaust. In filtered exhaust, we measured 0.74 +/- 0.07 (iron-catalyzed DPF) and 0.55 +/- 0.09 ng E2-CEQ m(-3) (copper/iron-catalyzed DPF), corresponding to reductions in estrogenic activity of 55 and 66%, respectively. Our study demonstrates that both catalytic DPFs lowered the ER-mediated endocrine-disrupting potential of diesel exhaust. 相似文献
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rac-1,2,10-Trimethoxy-aporphine ( 14 ) and rac-2-ethoxy-10,11-dimethoxyaporphine ( 27 ) have been synthesized from the 3-phenylphenethylamines 9 and 22 by a new route. The 8-phenyl-3,4-dihydroisoquinolines 11 and 24 , the oxo-aporphines 12 and 25 and the rac-nor-aporphines 13 and 26 were obtained as intermediates. 相似文献
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Biotin synthesis. Preparation of (3aS, 6aR)-1,3-dibenzyl-tetrahydro-4H-thieno(3,4-d)imidazole-2,4(1H)-dione 总被引:1,自引:0,他引:1
A modification of the biotin synthesis of Goldberg & Sternbach is described, enantiomers being separated in the first steps and wrong isomers recyclised. The conversion of the lactone 15 to the thiolactone 16 is done by a new method using potassium thioacetate in high boiling solvents. 相似文献
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E. Baldinger M. Weber E. Roth-Desmeules Ed. Gerecke H. Ziegler M. Jeger W. Roth-Desmeules W. Saxer 《Zeitschrift für Angewandte Mathematik und Physik (ZAMP)》1956,7(2):170-176
Ohne Zusammenfassung 相似文献
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