A Sulfone-Based Strategy for the Preparation of 2,4-Disubstituted Furan Derivatives
作者:Nathan R. Haines、Aaron N. VanZanten、Anthony A. Cuneo、John R. Miller、William J. Andrews、David A. Carlson、Ryan M. Harrington、Adam M. Kiefer、Jeremy D. Mason、Julie A. Pigza、S. Shaun Murphree
DOI:10.1021/jo201529s
日期:2011.10.7
3-dibromo-1-phenylsulfonyl-1-propene (DBP, 2) with 1,3-diketones under basic conditions. The furan-forming step involves a deacetylation, and the selectivity of this process depends upon the steric demand of the R group. The substituent in position 4 is elaborated by reaction of sulfonyl carbanions with alkyl halides, acyl halides, and aldehydes. Oxidative or reductive desulfonylation produces the 2,4-disubstituted