Alcaligenes latus strains can accumulate poly-D(-)-3-hydroxybutyrate (PHB) up to about 85% of cell dry weight. The abilities to store poly-D(-)-3-hydroxyvalerate (PHV) of three strains of A. latus were investigated. With Na-propionate as PHV precursor, strain A. latusDSM 1122 had better PHV accumulation ability than strains A. latus DSM 1123 and 1124. Strain A. latus DSM 1123 could store PHV when Na-valerate but not Na-propionate served as the PHV precursor. PHB and PHV accumulation by A. latus DSM 1124 rapidly increased when propionic acid and acetic acid were together added to the fermentor. This increase was not obtained in the culture shaker flask and fermentor growing the same strain when Na-propionate alone served as a PHV precursor.
S u~S o i i o r y h l i l o m e r r s a s h & W C o m~A~t sCompounds 1 form mtrd metal wmpkxes, whicb are insoluble in water and extractable'with CHC13 Due to tbe high N-H acidity of 1, complexation occurs with more than 20 metals, even in strongly acidic solution.N-Monosubstituierte N'-Sulfonylthioharnstoffe 1 lassen sich in einer einstufigen Synthese aus leicht zuganglichen Sulfonamiden und Isothiocyanaten darstellen ').
R 1, I-Disubstituierte I-Allyl-und I-Benzyl-hydrazmiumchloride lassen sich in Gegenwart von Basen unter HCI-Abspaltung zu 1.1 -disubstituierten 2-Allyl-bzw. 2-Benzyl-hydrazinen umldgern. Die Reaktion verlauft a i m Teil mit sehr guten Ausbeuten. Bei quartaren Propargylhydraziniumsalzen wird eine Umlagerung nur als Nebenreaktion beobachtet.Rearrangement of Quaternary Allyl-, Benzyl-, and Propargylhydrazinium Salts 1, I-Disubstituted 1 -ally]-and I -bcnzylhydrazinium chlorides rearrange in the presence of alkali to form I ,I-disubstituted 2-allyl-and 2-benzylhydrazines, respectively, in good yields. When the reaction was applied to quaternary propargylhydrazinium salts, rearrangement took place only to a small extent.I .2-Umlagerungen sind in der organischen Chemle haufige und oft praparativ wertvolle Reaktlonen. Dazu gehbren so altbekannte Reaktionen wie die Meisenheimer-Umlagerung der Aminoxidel, 2 ) . die Stevens-Umlagerung von Ammonium-3). Sulfonium-41, Stibonium-und Arsoniumsalzen~), die Wi'ittigsche kherumlagerung6' sowie die Grovenstein-Zimmermun-Reaktion7.81. Uber 1.2-Umlagerungen am Hydrazin-System ist nur wenig bekaiint geworden. So bildet sich 2.B. bei der Thermolyse des Amin-imids 1 das Hydrazid 2u): 1 ) J . Meisenheimer, Ber. dtsch. chem. Ges. 52, 1667 (1919): J. Meisenheimer, H. Greeske und A . Wilmersdorf, ebenda 55, 513 (1922).
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