Kinetics and regioselectivity in the Diels–Alder reaction of fulleroids vs. methanofullerene and C60
作者:Naohiko Ikuma、Yasunori Susami、Takumi Oshima
DOI:10.1039/b918005b
日期:——
from the 1,3-dipolar cycloaddition of fullerene with a diazoalkane, have a [5,6]-open methylene bridge and two highly twisted bridgehead double bonds. The [H,H]- and [H,CN]-substituted fulleroids were found to display significantly enhanced and regioselective Diels–Alder addition as compared with the [6,6] closed methanofullerene and C60 with 2,3-dimethyl-1,3-butadiene, but reduced and nonregioselective
从富勒烯与重氮烷的1,3-偶极环加成反应获得的富勒烯具有[5,6]-开放的亚甲基桥和两个高度扭曲的桥头双键。这 [高,低与[6,6]封闭的相比,发现]-和[H,CN]取代的富勒化合物显示出显着增强的和区域选择性的Diels–Alder添加 甲基富勒烯和C 60与2,3-二甲基-1,3-丁二烯,但减少且非区域选择性加成 环戊二烯。1:1加合物的NMR分析和量子计算表明,高反应性和区域选择性加成是由于桥头双键处的π轨道未对准。