Table 1. Reaction conditions of one-phase hydrosilylations. No. temperature catalyst conc. [mol-%] cristal water in catalyst co-catalyst 1a 90 C 0.45 ± ± 1b 90 C 0.10 ± ± 1c 90 C 0.10 + ± 1d 90 C 0.01 ± ± 2a RT 0.45 ± ± 2b RT 0.10 ± ± 2c RT 0.10 ± Pr i OH 2d RT 0.10 ± oxygen 2e RT 0.01 ± ±
Procedure for Hydrosilylation Reactions in a Biphasic System30 ml anhydrous propylene carbonate, 30 ml n-hexane or cyclohexane, 5.94 g (30 mmol) 10-undencenoic methyl ester and 4.95 g (30 mmol) triethoxysilane were placed in an argonswept tempered (25 C and 80 C, respectively) 100 ml threenecked flask equipped with an argon tube. After the addition of 0.012 g (29 mm mol, 0.1 mol-% referring to one reaction component) anhydrous hexachloroplatinum acid the mixture was stirred for the indicated time.
Procedure for Thermoregulated Catalyst Recycling20 ml anhydrous propylene carbonate, 20 ml n-hexane (or cyclohexane), 20 ml toluene, 5.94 g (30 mmol) 10-undencenoic methyl ester, 4.95 g (30 mmol) triethoxysilane and 0.012 g (29 mm mol, 0.1 mol-% referring to one reaction component) anhydrous hexachloroplatinum acid were placed in an argonswept tempered (80 C) 100 ml three-necked flask equipped with an argon tube under intensive mixing. Cooling the reaction mixture down to room temperature is accompanied by phase separation.
AcknowledgementThe authors are grateful to Wacker-Chemie (Munich) and Degussa-Hüls AG (Hanau) for the donation of chemicals and as part of the ªKatalyseverbund NRWº to the Ministerium für Wissenschaft und Forschung des Landes Nordrhein-Westfalen for financial support.
Zusammenfassung
Anhand von 6 Fällen humaner Aktinomykose der Haut wird die Problematik der Pathogenese der mikrobiologischen und klinischen Diagnostik dargestellt. Die Diagnose ist in erster Linie vom Kliniker zu stellen. In atypischen Fällen gewinnt der Aktino‐myzetennachweis erheblich an Bedeutung. Andererseits handelt es sich keinesfalls überall dort, wo Aktinomyzeten gefunden werden, um eine Aktinomykose.
Summary
Reporting 6 cases of human actinomycosis of skin the problems of pathogenesis, microbiological and clinical diagnosis are presentated. Diagnosis first of all is a problem of the clinicians. Actinomyces‐finding above all gets important für atypical cases. On the other hand the question is not at all an actinomycosis, if Actinomyces is found there.
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