Synthesis of Substituted Quinolines by Electrophilic Cyclization of <i>N</i>-(2-Alkynyl)anilines
作者:Xiaoxia Zhang、Marino A. Campo、Tuanli Yao、Richard C. Larock
DOI:10.1021/ol0476218
日期:2005.3.1
Quinolines substituted in the 3-position by an iodo or phenylseleno group are readily prepared in good to excellent yields by the reaction of propargylic anilines with appropriate electrophiles under mild reaction conditions. [reaction: see text]
Synthesis of substituted quinolines by the electrophilic cyclization of n-(2-alkynyl)anilines
作者:Xiaoxia Zhang、Tuanli Yao、Marino A. Campo、Richard C. Larock
DOI:10.1016/j.tet.2009.12.012
日期:2010.2
A wide variety of substituted quinolines are readily synthesized under mild reaction conditions by the 6-endo-dig electrophilic cyclization of N-(2-alkynyl)anilines by ICl, I2, Br2, PhSeBr, and p-O2NC6H4SCl. The reaction affords 3-halogen-, selenium- and sulfur-containing quinolines in moderate to good yields in the presence of various functional groups. Analogous quinolines bearing a hydrogen in the
Synthesis of spiro-4<i>H</i>-pyrazole-oxindoles and fused 1<i>H</i>-pyrazoles <i>via</i> divergent, thermally induced tandem cyclization/migration of alkyne-tethered diazo compounds
A thermally induced, substrate-dependent reaction of alkynyl diazocompounds has been developed. This transformation produces spiro-4H-pyrazole-oxindoles and fused 1H-pyrazoles in good to high yields from the corresponding alpha-cyano and alpha-sulfonyl diazocompounds. The salient features of this reaction include excellent chemoselectivity and atom-economy, mild reaction conditions, simple purification
Synthesis of 3-sulfonylquinolines by visible-light promoted metal-free cascade cycloaddition involving <i>N</i>-propargylanilines and sodium sulfinates
A visible-light promoted radical cascade reaction of N-propargylanilines with sodium sulfinates as sulfonyl radical precursors was developed under metal-free conditions.