Journal
ORGANIC LETTERS
Volume 24, Issue 28, Pages 5040-5044Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.2c01799
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Funding
- JSPS KAKENHI [JP20K05485, JP21H01923, JP21K14616]
- Photoexcitonix Project of Hokkaido University
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A two-step synthesis of geminal divinyl compounds from ketones was developed. An allyl titanium reagent reacted with a ketone to form a tertiary alcohol, which was then subjected to a rearrangement reaction mediated by a Bronsted acid to generate a geminal divinyl compound. Introduction of another alkene moiety followed by ring closing metathesis resulted in a bicyclic compound possessing a vinyl group at the bridgehead position.
A two-step synthesis of geminal divinyl compounds from ketones was developed. An allyl titanium reagent prepared from 1-phenylthio-4-trimethylsilyl-2-butene was reacted with a ketone, and the resulting tertiary alcohol was subjected to a Bronsted acid-mediated rearrangement reaction to generate a geminal divinyl compound. Introduction of another alkene moiety followed by ring closing metathesis resulted in a bicyclic compound possessing a vinyl group at the bridgehead position.
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