Synthesis of perhydro-1,4-selenazines and perhydro-1,4-tellurazines containing a sulfamide group
β Scribed by V. G. Lendel; A. Yu. Sani; Yu. Yu. Migalina; B. I. Pak; I. M. Balog
- Publisher
- Springer US
- Year
- 1989
- Tongue
- English
- Weight
- 236 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0009-3122
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π SIMILAR VOLUMES
## Abstract Treatment of Οβhalo alkylamines **9** and **10** with aryl and alkyl isoselenocyanates **6a**β**g** in the presence of triethylamine in dichloromethane gave the corresponding 1,3βselenazolidines **11a**β**g** and perhydroβ1,3βselenazines **12a**β**g**, respectively, in good to excellent
1,2,4-Triazanes and 1,3,4\_thiadiazanes are previously unknown classes of compound: we have now synthesised representatives of each (Scheme 1) by methods which utilise thiiran n and N-methylaziridine and are extensions of our previously reported' synthesis of the 1,3,4-oxadiazane ring system.
The solid phase synthesis of 1,3,4,7-Tetrasubstituted Perhydro-l,4-diazepine-2,5-diones is described. Starting from the resin-bound tBu ester ofaspartic acid and employing reductive alkylation and
Depending on the reaction conditions eithcr 2.6-disubstitutcd 2,3,5,6-tetrahydro-4H-1,3-thiazin-4-ones 4 or 1,6-disubstitutcd 2-thiouracils 5 are readily prepared by base-catalyzcd cyclization of N-propenoylthioureas 3. Compounds 5 could also bc obtained by Dimroth-type rearrangement of 1,3-thiazin-