Synthesis of 2,6-Diamino-3,5-dicyano-4-ethyl-4H-thiopyran and Its Recyclization into 6-Amino-3,5-dicyano-4-ethylpyridine-2(1H)-thione. -Three component condensation of propionaldehyde with malononitrile and cyanothioacetamide provides the title diaminothiopyran (IV) which recyclizes at reflux into
Synthesis of 2-(3,3-Dicyano-2-propenylidene)-4,4,5,5-tetramethyldioxolane and Its Reactions with Hydrazine and Primary Amines.
✍ Scribed by S. N. Chuprakov; R. V. Tyurin; L. G. Minyaeva; L. V. Mezheritskaya; V. V. Mezheritskii
- Publisher
- John Wiley and Sons
- Year
- 2004
- Weight
- 148 KB
- Volume
- 35
- Category
- Article
- ISSN
- 0931-7597
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-ones (3) were obtained from some 2,3-dihydro-furan-2,3-diones with a few Wittig reagents ( 2). The compounds of 3 with glycin and hydrazines (4a,b) produced 2,3-dihydro- . All the reaction mechanisms were discussed by utilizing the similar reaction pathways. Structures of these compounds were deter
## Abstract The direct sulfonylation of 4,5‐dichloropyridazin‐3‐ones with some benzenesulfonyl chlorides in the presence of base in tetrahydrofuran gave only the corresponding __N__‐sulfonylated product. The reaction of 2‐benzenesulfonyl‐4,5‐dichloropyridazin‐3‐ones with some aliphatic amines under