Photochemical fragmentation of a methylenecyclopropane
β Scribed by Gilbert, J. C.; Luo, T.
- Book ID
- 126960209
- Publisher
- American Chemical Society
- Year
- 1981
- Tongue
- English
- Weight
- 406 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0022-3263
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π SIMILAR VOLUMES
## Abstract In contrast to the thermal rearrangement, the photochemically induced methylenecyclopropane rearrangement of diethyl __trans__βmethylenecyclopropaneβ2,3βdicarboxylate (I) and of ethyl ethoxycarbonylcyclopropylideneacetate (__syn__ or __anti__) produced diethyl __cis__βmethylenecycloprop
Recently Adam and Schreiber (l), on attempting to apply the Hofmann-L8ffler reaction (2) to the N-chloro compound I, diecovered a new type of fragmentation, the main products obtained on UV irradiation being the 20(R) and 20(S)-chloro-5a-pregnane-3!3-ol (II). We have now shown that this same type of