Dual-Catalyst Acceleration of Tandem Disulfide Cleavage and Baylis–Hillman Synthesis of 2<i>H</i>-1-Benzothiopyran Derivatives
作者:Dubekile Nyoni、Kevin A. Lobb、Perry T. Kaye
DOI:10.1080/00397911.2012.673449
日期:2013.7.3
While both 1,8-diazabicyclo[5.4.0]undec-7-ene and triphenylphosphine catalyze tandem Baylis-Hillman reaction/disulfide cleavage of 2,2'-dithiodibenzaldehyde independently, when used together as a dual-catalyst system, the overall yields of the cyclized 2H-1-benzothiopyrans are consistently greater and the reaction time decreases dramatically.Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) to view the free supplemental file.