Results 61 to 70 of about 1,392 (175)

The Isomerization of Triphenylmethyl Isocyanide: Evidence for a Cationic Chain Mechanism in Polar Solvents

open access: yesCHIMIA, 1986
Triphenylmethyl isocyanide (1) isomerizes to triphenylmethyl cyanide (2) in non-polar solvents at 200-250 °C by a sigmatropic 1,2-rearrangement. To account for the high rate of rearrangement in polar solvents (e.g.
Michael Meier, Christoph Rüchardt
doaj   +1 more source

[Care of critically ill nontrauma patients in the resuscitation room]. [PDF]

open access: yesNotf Rett Med, 2022
Bernhard M   +8 more
europepmc   +1 more source

Schneider, Hans-Peter y Zeh, Wolfgang, eds.: «Parlamentsrecht und Parlamentspraxis in der Bundesrepublik Deutschland»

open access: yesRevista de las Cortes Generales, 1991
Recensión sobre la obra de Schneider, Hans-Peter y Zeh, Wolfgang, «Parlamentsrecht und Parlamentspraxis in der Bundesrepublik Deutschland»
Antonio Embid Irujo
doaj   +1 more source

National Competence Based Catalogue of Learning Objectives for Undergraduate Medical Education (NKLM) – process description over the last 15 years

open access: yesGMS Journal for Medical Education
Introduction: The “National Competence Based Catalogue of Learning Objectives for Undergraduate Medical Education” (NKLM) constitutes the content framework for medical studies in the Federal Republic of Germany.
Jacqueline Jennebach   +14 more
doaj   +1 more source

Synthese von Bis(sulfinylamido)selen OSN–Se–NSO

open access: yesCHIMIA, 1987
Se(NSO)2 is formed in good yields from Se2Cl2 and (CH3)3SiNSO dissolved in dichloromethane or hexamethyldisiloxane. Structural, spectroscopic, and physical data for the new selenium pseudohalide are presented.
Alois Haas, Jörg Kasprowski
doaj   +1 more source

[4 + 2]-Cycloaddition with Inverse Electron Demand: Reaction of 3-Vinylindoles with Dimethyl 1,2,4,5-Tetrazine-3,6- dicarboxylate

open access: yesCHIMIA, 1987
The 1'-substituted 3-vinylindoles 1a and 1b react locoselectively with the tetrazine 2 to form the corresponding 1,4-dihydro-1,2-diazines. The 2'-methoxy-substituted compound 1c yields the 4-(indol-3-yl)-substituted 1,2-diazine 5 on reaction with the ...
Ulf Pindur, Ludwig Pfeuffer
doaj   +1 more source

Synthese und Eigenschaften von Tris(trifluormethylsulfonyl)amin

open access: yesCHIMIA, 1986
Tris(trifluoromethylthio)amine dissolved in pentane is oxidized by sodium hypochlorite at 0°C (3.5 h) to (CF3SO2)3N. Similarly the known (CF3SO2)2NNa is prepared from (CF3S)2NH. Actually (CF3SO2)3N is the first tertiary sulfonamide at all.
Alois Haas, Christiane Klare
doaj   +1 more source

Trifluoromethylsulfide Anion: Generation and Reaction with Pentafluoropyridine

open access: yesCHIMIA, 1985
The anion F3CS⊖, generated from thiocarbonyl difluoride 1 and alkali metal fluorides, reacts with pentafluoropyridine 2 to give high yield of 2,3,5,6-tetrafluoro-4-trifluoromethylthiopyridine 3.
Wojciech Dmowski, Alois Haas
doaj   +1 more source

[Public mental health: development of a research and action field]. [PDF]

open access: yesBundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz, 2023
Kuhn J   +3 more
europepmc   +1 more source

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