Aus dem Thiosemicarbazid (I) werden mit aromatischen Aldehyden (II) die Thiosernicarbazone (III) hergestellt, die nach Isolierung zu den Thiadiazolinen (IV) cyclisiert werden und auf antibaktenelle Wirkung geprüft werden.

Die Umsetzung der Thiosemicarbazide (I) mit salpetriger Säure (II) ergibt die Thiatriazole (III), die unter basischen Bedindungen zu den entsprechenden Tetrazolthiolen (IV) isomerisieren.

SummaryIrradiation of (RS,SR)-3-Phenyl-6-hepten-2-01 (3n) gave the photoproducts 6n-10n. Some reactions of 6n and 8n are reported. The regio-and diastereoselectivity observed in the photoreaction of substituted 5-phenylpentenes is discussed with respect to conformational preferences of the compounds to be irradiated.Introduction. -Polycyclic hydrocarbons in which four rings are annulated in such a way that they share a common C-atom are of interest for a study of the planarization of the tetracoordinate C-atom [l]. The [5.5.5.5]fenestranes ( = 'tetraquinacanes' or 'stauranes'; systematic name: tetracyclo[5.5.1 .04,13.0'",'3]tride~anes) are particularly attractive since they eventually might be transformed into a [12]annulene with a central C-atom [2]. Although a few syntheses of fenestranes have been reported [lc] [3], short and efficient routes for their preparation are still in need. We report our results of the intramolecular photocycloaddition of 3-phenyl-6-hept-en-2-01 (3n).

2‐Hydroxy‐5‐methyl‐acetophenon (I) liefert mit (II) die Schiffschen Basen (III), die mit Thioglykolsäure zu den Thiazolidinonen (IV) kondensiert werden können.