Synthesis and Cycloaromatization of a Cyclic Enyne−Allene Prodrug
摘要:
A simple and stable cyclic enediynone (4) has been synthesized using an intramolecular Nozaki-Hiyama-Kishi cyclization as the key step. Reaction with a thiolate nucleophile led to rapid cycloaromatization of 4. Trapping experiments using 1,4-cyclohexadiene support the intermediacy of an aromatic diradical in the cycloaromatization.
Generation and Characterization of a Distonic Biradical Anion Formed from an Enediynone Prodrug in the Gas Phase
作者:Linan Yang、Tefsit Bekele、Mark A. Lipton、Hilkka I. Kenttämaa
DOI:10.1007/s13361-012-0567-8
日期:2013.4.1
A negatively charged biradical intermediate was successfully generated in the gasphase via cyclization of the deprotonated bicyclo[8.3.0]trideca-12-ene-2,7-diyn-1-one precursor. The inherent negative charge of this biradical allows its characterization via collision-activated dissociation and reactions with a variety of neutral substrates in an FT-ICR mass spectrometer. Although the biradical is unreactive
Synthesis and Cycloaromatization of a Cyclic Enyne−Allene Prodrug
作者:Tefsit Bekele、Steven R. Brunette、Mark A. Lipton
DOI:10.1021/jo034278w
日期:2003.10.1
A simple and stable cyclic enediynone (4) has been synthesized using an intramolecular Nozaki-Hiyama-Kishi cyclization as the key step. Reaction with a thiolate nucleophile led to rapid cycloaromatization of 4. Trapping experiments using 1,4-cyclohexadiene support the intermediacy of an aromatic diradical in the cycloaromatization.