It is a challenging task to control regioselective cycloaddition for polyolefins.Triazolines are a prominent class of heterocycles in organic synthesis and pharmaceutical chemistry.Among the numerous synthetic protoco...It is a challenging task to control regioselective cycloaddition for polyolefins.Triazolines are a prominent class of heterocycles in organic synthesis and pharmaceutical chemistry.Among the numerous synthetic protocols for the formation of triazolines,the 1,3-dipolar cycloaddition of azides to neutral alkenes is an effective method[1].To the best of our knowledge,the ionic cycloaddition between azides and ionic alkenes remains unexplored to date.It has been found that Coobehaves likean electron-deficientalkene and that its[6,6]-bonds are C=C double bonds and dipolarophilic,which enable C_(60) to undergo various[2+3]cycloadditions[2].展开更多
With the recent advance in chemical modification of fullerenes,electrosynthesis has demonstrated increasing importance in regioselective synthesis of novel fullerene derivatives.Herein,we report successively regiosele...With the recent advance in chemical modification of fullerenes,electrosynthesis has demonstrated increasing importance in regioselective synthesis of novel fullerene derivatives.Herein,we report successively regioselective synthesis of stable tetra-and hexafunctionalized[60]fullerene derivatives.The cycloaddition reaction of the electrochemically generated dianions from[60]fulleroindolines with phthaloyl chloride regioselectively affords 1,2,4,17-functionalized[60]fullerene derivatives with two attached ketone groups and a unique addition pattern,where the heterocycle is rearranged to a[5,6]-junction and the carbocycle is fused to an adjacent[6,6]-junction.This addition pattern is in sharp contrast with that of the previously reported biscycloadducts,where both cycles are appended to[6,6]-junctions.The obtained tetrafunctionalized compounds can be successively manipulated to 1,2,3,4,9,10-functionalized[60]fullerene derivatives with an intriguing“S”-shaped configuration via a novel electrochemical protonation.Importantly,the stability of tetrafunctionalized[60]fullerene products allows them to be applied in planar perovskite solar cells as efficient electron transport layers.展开更多
基金supported by the National Natural Science Foundation of China (22071231 and 21772189)。
文摘It is a challenging task to control regioselective cycloaddition for polyolefins.Triazolines are a prominent class of heterocycles in organic synthesis and pharmaceutical chemistry.Among the numerous synthetic protocols for the formation of triazolines,the 1,3-dipolar cycloaddition of azides to neutral alkenes is an effective method[1].To the best of our knowledge,the ionic cycloaddition between azides and ionic alkenes remains unexplored to date.It has been found that Coobehaves likean electron-deficientalkene and that its[6,6]-bonds are C=C double bonds and dipolarophilic,which enable C_(60) to undergo various[2+3]cycloadditions[2].
基金supports from the National Natural Science Foundation of China(21572211,51572254)the Strategic Priority Research Program of the Chinese Academy of Sciences(XDB20000000)the National Key Research and Development Program of China Stem Cell and Translational Research(2017YFA0402800).
文摘With the recent advance in chemical modification of fullerenes,electrosynthesis has demonstrated increasing importance in regioselective synthesis of novel fullerene derivatives.Herein,we report successively regioselective synthesis of stable tetra-and hexafunctionalized[60]fullerene derivatives.The cycloaddition reaction of the electrochemically generated dianions from[60]fulleroindolines with phthaloyl chloride regioselectively affords 1,2,4,17-functionalized[60]fullerene derivatives with two attached ketone groups and a unique addition pattern,where the heterocycle is rearranged to a[5,6]-junction and the carbocycle is fused to an adjacent[6,6]-junction.This addition pattern is in sharp contrast with that of the previously reported biscycloadducts,where both cycles are appended to[6,6]-junctions.The obtained tetrafunctionalized compounds can be successively manipulated to 1,2,3,4,9,10-functionalized[60]fullerene derivatives with an intriguing“S”-shaped configuration via a novel electrochemical protonation.Importantly,the stability of tetrafunctionalized[60]fullerene products allows them to be applied in planar perovskite solar cells as efficient electron transport layers.
