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Optically active organotin compounds I preparation and reaction of (1-methyl-2, 2-diphenylcyclopropyl)trimethyltin

✍ Scribed by Keiiti Sisido; Sinpei Kozima; Kôiti Takizawa


Book ID
104224080
Publisher
Elsevier Science
Year
1967
Tongue
French
Weight
213 KB
Volume
8
Category
Article
ISSN
0040-4039

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## Abstract The reaction of some active methylene compounds with 4‐(dicyanomethylene)‐3‐methyl‐1‐phenyl‐2‐pyrazoline‐5‐one (1a) has been investigated. This reaction involves a Michael addition to afford 4‐spirocyclobutenes 3 or cyclopyran‐2‐pyrazoline‐5‐ones 4, depending on the active methylene der