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Unveiling a Strategy for Ring Opening of Epoxides: Synthesis of 2-Hydroxyindolinylidenes Using α-Ester Sulfoxonium Ylides
- Source :
- Organic Letters; February 2024, Vol. 26 Issue: 5 p1034-1039, 6p
- Publication Year :
- 2024
-
Abstract
- The untapped potential of α-carbonyl sulfoxonium ylides in epoxide ring-opening reactions has been a notable gap in current research, with such reactivity predominantly associated with the highly reactive dimethylsulfoxonium methylide. This study introduces an innovative approach wherein an epoxide indole, formed in situfrom 2-hydroxyindoline-3-triethylammonium bromide, undergoes reaction with α-ester sulfoxonium ylides. The outcome is the efficient synthesis of a range of 2-hydroxyindolin-3-ylidenes, demonstrating favorable yields (41–81%) and Z/Eratios from 4:1 to those of exclusive Zisomers. Additionally, the photophysical properties of the synthesized indolinylidenes are explored, along with their derivatization using various nucleophiles under acid catalysis.
Details
- Language :
- English
- ISSN :
- 15237060 and 15237052
- Volume :
- 26
- Issue :
- 5
- Database :
- Supplemental Index
- Journal :
- Organic Letters
- Publication Type :
- Periodical
- Accession number :
- ejs65322567
- Full Text :
- https://doi.org/10.1021/acs.orglett.3c04169