Publication: Ringöffnungen von sterisch gehinderten spirocyclischen 2,5-Dihydro- 1,3,4-thiadiazolen mit cycloaliphatischen, sekundären Aminen
Ringöffnungen von sterisch gehinderten spirocyclischen 2,5-Dihydro- 1,3,4-thiadiazolen mit cycloaliphatischen, sekundären Aminen
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Mlostoń, G., Romański, J., Linden, A., & Heimgartner, H. (1997). Ringöffnungen von sterisch gehinderten spirocyclischen 2,5-Dihydro- 1,3,4-thiadiazolen mit cycloaliphatischen, sekundären Aminen. Helvetica Chimica Acta, 80, 230–240.
Abstract
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Abstract
Ring Opening of Sterically Crowded Spirocyclic 2,S-Dihydro-1,3,4-thiadiazoles by Cycloaliphatic Secondary Amines At room temperature, the spirocyclic 2,5-dihydro-1,3,4-thiadiazole 3 reacted with cyclic secondary amines 6 via ring opening to give N-alkylidene-hydrazones of type 7 (Scheme 2). A reaction mechanism via a base-catalyzed transformation of the dihydrothiadiazole ring to the corresponding thiolate 19 and the intermediate thioaldehyde 21 is proposed in Scheme 6. An analogous reaction occurred with the mixture of the dispiro co
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- Mlostoń, Grzegorz
- Romański, Jaroslaw
- Heimgartner, Heinz
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Mlostoń, G., Romański, J., Linden, A., & Heimgartner, H. (1997). Ringöffnungen von sterisch gehinderten spirocyclischen 2,5-Dihydro- 1,3,4-thiadiazolen mit cycloaliphatischen, sekundären Aminen. Helvetica Chimica Acta, 80, 230–240.
