Diverse 3‐alkylthiochromones were synthesized through radical‐triggered cyclization of methylthio‐substituted alkynones with a wide variety of radical precursors under mild conditions. By voiding the use of metal catalysts and the ability of radical cyclization of alkynones without further substrate preactivation, this method becomes both more environmentally friendly and simpler to carry out than
Radical Promoted C(sp<sup>2</sup>)–S Formation and C(sp<sup>3</sup>)–S Bond Cleavage: Access to 2-Substituted Thiochromones
作者:Jian Xu、Fan Zhang、Shifan Zhang、Li Zhang、Xiaoxia Yu、Jianxiang Yan、Qiuling Song
DOI:10.1021/acs.orglett.9b00023
日期:2019.2.15
A radical-promoted cyclization of methylthiolated alkynones with diverse radical precursors has been developed. This strategy occurred via a C(sp2)–S bond formation and C(sp3)–S cleavage sequence and allows an efficient synthesis of a variety of phosphoryl-, sulfenyl-, CF2COOEt-, and acyl-containing thiochromone derivatives in moderate to good yields under mild conditions.
Direct lithiation of chalcogenachromones, -flavones, and -pyranones. The interconversion and electrophilic capture of ring-opened and ring-closed anions
作者:Michael R. Detty、Lynda W. McGarry
DOI:10.1021/jo00241a015
日期:1988.3
LUXEN, A. J.;CHRISTIAENS, L. E. E.;RENSON, M. J., J. ORGANOMET. CHEM., 1985, 287, N 1, 81-85
作者:LUXEN, A. J.、CHRISTIAENS, L. E. E.、RENSON, M. J.