Negishi Coupling between α-Alkyl(aryl)thio Vinyl Zinc Chloride and α-Bromo Vinyl Ether: A Convergent Synthesis of 2-Alkoxy-3-alkyl(aryl)thiobuta-1,3-dienes<sup>1</sup>
作者:Mei Su、Ying Kang、Wensheng Yu、Zhengmao Hua、Zhendong Jin
DOI:10.1021/ol010252k
日期:2002.3.1
see text] A convergent approach for the stereoselective synthesis of 2-alkoxy-3-alkyl(aryl)thiobuta-1,3-dienes has been developed. It was found that Negishi coupling between alpha-alkyl(aryl)thio vinyl zinc chloride and alpha-bromo vinyl ether or Negishi coupling between alpha-bromo vinylsulfide and alpha-alkoxy vinyl zinc chloride provided the best yield and stereoselectivity.
Total Synthesis of the Anticancer Natural Product OSW-1
作者:Wensheng Yu、Zhendong Jin
DOI:10.1021/ja012119t
日期:2002.6.1
selenium dioxide-mediated allylic oxidation of 80 and a highly stereoselective 1,4-addition of alpha-alkoxy vinylcuprates 68 to steroid 17(20)-en-16-one 12E to introduce the steroid side chain. This total synthesis demonstrated once again the versatile syntheticapplications of alpha-halo vinyl ether chemistry developed in our laboratories.