Journal
ORGANIC & BIOMOLECULAR CHEMISTRY
Volume 19, Issue 24, Pages 5353-5357Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ob00887k
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Funding
- National Natural Science Foundation of China [21772182]
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An unprecedented [2,3]-sigmatropic rearrangement reaction has been established using quaternary 2,3-allenylammonium ylides generated in situ from tertiary 2,3-allenylamines and arynes. The reaction, which proceeds smoothly at room temperature, delivers structurally diverse products in moderate to excellent yields and is tolerant to a wide variety of functional groups. This reaction is carried out without the need for strong bases or transition metals, making it a versatile and convenient method for organic synthesis.
An unprecedented [2,3]-sigmatropic rearrangement reaction of quaternary 2,3-allenylammonium ylides, generated in situ from tertiary 2,3-allenylamines and arynes, has been established. With 2-(trimethylsilyl)aryl triflates as aryne precursors, a range of tertiary 2,3-allenylamines bearing an electron-withdrawing group at the alpha-position smoothly participated in the aryne-mediated [2,3]-sigmatropic rearrangement at room temperature, delivering structurally diverse 2-vinylallyamines or 1-amino-1,3-dienes in moderate to excellent yields. The reaction proceeds in the absence of strong bases and transition metals, is compatible with moisture and air, and tolerates a wide variety of functional groups.
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