A New Entry to Oxacycles via Base-Catalyzed Endo Mode Cyclization of Allenyl Sulfoxides and Sulfones
作者:Chisato Mukai、Haruhisa Yamashita、Miyoji Hanaoka
DOI:10.1021/ol0101842
日期:2001.10.1
[GRAPHICS]Treatment of the allenyl sulfoxides and sulfones possessing a proper delta -hydroxy appendage at the C-1 position with potassium tert-butoxide effected endo mode ring closure at the sp-hybridized carbon center of the allenyl moiety to provide the five- to eight-membered oxacycles in high yields.