文献类型：期刊文献

英文题名：PPh₃-Catalyzed (3+3) Annulations of 5-Acetoxypenta-2,3-dienoate with 1C,3O-Bisnucleophiles: Facile Entry to Stable Monocyclic 2H-Pyrans

作者：Hu, Jian;Dong, Wei;Wu, Xin-Yan;Tong, Xiaofeng[1]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China

年份：2012

卷号：14

期号：21

起止页码：5530

外文期刊名：ORGANIC LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000311245600038)，CCR-EXPANDED(收录号:WOS:000311245600038)】；

基金：The financial support from NSFC (No. 21002025), the Fundamental Research Funds for the Central Universities, Shanghai Rising-Star Program (11QA1401700), and Specialized Research Fund for the Doctoral Program of Higher Education (20100074120014) are highly appreciated.

语种：英文

摘要：Phosphine-catalyzed (3 + 2) and (3 + 3) annulations between 5-acetoxypenta-2,3-dienoate and 1C,3O-bisnucleophiles are presented. The former cases can be achieved with the assistance of base while the latter is dominant without any additive. A series of deuterium-labeling experiments disclosed that the divergence in annulations is likely determined by the involved proton transfer processes.