A Catalyst-Free Self-Catalyzed [3+2] Cycloaddition Reaction of 3-Isothiocyanato Oxindoles and Vinylpyridines
作者:Hou-Ze Gui、Yin Wei、Min Shi
DOI:10.1002/ejoc.201801091
日期:2018.9.23
We have developed a catalyst‐free self‐catalyzed [3+2] cycloaddition reaction of 3‐isothiocyanato oxindoles with vinylpyridines through mutual activation in good yields.
Highly Efficient and Diastereoselective Construction of Trifluoromethyl‐Containing Spiro[pyrrolidin‐3,2′‐oxindole] by a Catalyst‐free Mutually Activated [3+2] Cycloaddition Reaction
作者:Hou‐Ze Gui、Yu‐Ning Gao、Yin Wei、Min Shi
DOI:10.1002/chem.201801971
日期:2018.7.17
catalyst‐free self‐catalyzed [3+2] cycloaddition reaction of isatin‐derived α‐(trifluoromethyl)imines with vinylpyridines is reported. The reaction offers a straightforward and atom‐economical procedure for the preparation of a series of 5′‐trifluoromethyl‐spiro[pyrrolidin‐3,2′‐oxindoles] in excellent yields and diastereoselectivities. The reaction mechanism has been investigated by control experiments