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Sagami Chemical Research Institute
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Sagami Chemical Research Institute
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Application filed by Sagami Chemical Research InstitutefiledCriticalSagami Chemical Research Institute
Priority to JP3115579ApriorityCriticalpatent/JPS55124780A/en
Publication of JPS55124780ApublicationCriticalpatent/JPS55124780A/en
Publication of JPS631310B2publicationCriticalpatent/JPS631310B2/ja
NEW MATERIAL:A 7-alkylidenebicyclo[2.2.1]heptene derivative of formulas I-A and I- B (R and R1W2 are alkyl groups; R1 and R2 may form a cycloalkylene group with the carbon atoms to which they are linked; X' and Y' are halogen or halocarbonyl groups).
USE: Precursors for prostaglandin, capable of being led to the objective compound readily in high yield.
PROCESS: A 6-(2,2-ethylenedioxyethyl)fulvene derivative of formula II is subjected to the Diels-Alder reaction with a 1,1-disubstituted ethylene, e.g. α-chloroacryloyl chloride, of formula III to form the compound of formula I-A.
NEW 20,21-DINOREBURNAMENIN DERIVATIVES, SUBSTITUTIALLY SUBSTITUTED ON THE E-RING, PROCEDURES AND INTERMEDIATES FOR PREPARING THEREOF, USING ITS LICENSES AND COMPOSITIONS CONTAINING THEM