Activation of alkynes with B(C6F5)3: boron allylation reagents derived from propargyl esters
Novel allyl boron compounds are readily synthesized via rearrangement reactions between Lewis acidic B(C6F5)3 and propargyl esters. These reactions proceed through an initial cyclization followed by ring-opening and concurrent C6F5-group migration. In the absence of disubstitution adjacent to the es...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2014
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| In: |
Journal of the American Chemical Society
Year: 2013, Volume: 136, Issue: 2, Pages: 777-782 |
| ISSN: | 1520-5126 |
| DOI: | 10.1021/ja4110842 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1021/ja4110842 Verlag, lizenzpflichtig, Volltext: https://pubs.acs.org/doi/10.1021/ja4110842 
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| Author Notes: | Max M. Hansmann, Rebecca L. Melen, Frank Rominger, A. Stephen K. Hashmi, and Douglas W. Stephan |
| Summary: | Novel allyl boron compounds are readily synthesized via rearrangement reactions between Lewis acidic B(C6F5)3 and propargyl esters. These reactions proceed through an initial cyclization followed by ring-opening and concurrent C6F5-group migration. In the absence of disubstitution adjacent to the ester oxygen atom, an allyl boron migration rearrangement leads to formal 1,3-carboboration products. These allyl boron compounds act as allylation reagents with aldehydes introducing both a C3-allyl fragment and a C6F5-unit as a single anti-diastereomer. In these reactions, B(C6F5)3 activates the alkynes, prompting the rearrangement processes and enabling installations of C6F5 and R-groups. |
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| Item Description: | Im Titel sind die Ziffer "6" "5" "3" tiefgestellt Published: December 19, 2013 Gesehen am 29.10.2020 |
| Physical Description: | Online Resource |
| ISSN: | 1520-5126 |
| DOI: | 10.1021/ja4110842 |