In one embodiment, the present invention is directed to a method for synthesizing compounds of the formula
where C
m
is a fullerene having m carbon atoms, the method comprising the steps of forming a linear malonate compound of the formula
where each Z is the same or different and is a straight-chain or branched-chain aliphatic radical having from 1-30 carbon atoms which may be unsubstituted or monosubstituted or polysubstituted by identical or different substitutents, in which radicals up to every third —CH
2
— unit can be replaced by O or NR″, n is an integer from 2 to 10, and the unfilled valences of the first and nth malonate groups are filled with bonds to hydrogen, a hydrocarbon group or substituted hydrocarbon group having 1-20 carbon atoms, or a chain containing unsubstituted or substituted aryl or other cyclic groups; or (ii) a branched malonate compound of the formula
where Z′ is an aliphatic radical having from 1-30 carbon atoms which may be unsubstituted or monosubstituted or polysubstituted by identical or different substitutents, in which radicals up to every third —CH
2
— unit can be replaced by O or NR″; and n is an integer from 2 to 10;
reacting said malonate compound with C
m
to form an adduct of the formula
each Z is bonded to both one carboxylate group of a first malonate moiety and one carboxylate group of a second malonate moiety and the unfilled valences of the first and nth malonate groups are filled with bonds to hydrogen, a hydrocarbon group or substituted hydrocarbon group having 1-20 carbon atoms, or a chain containing unsubstituted or substituted aryl or other cyclic groups; and hydrolyzing said adduct to form the compound.
在一个实施例中,本发明涉及一种合成具有下式的化合物的方法:其中Cm是具有m个碳原子的
富勒烯,所述方法包括以下步骤:形成具有下式的线性马隆酸酯化合物:其中每个Z相同或不同,是具有1-30个碳原子的直链或支链脂肪族基,可以是未取代的或单取代的或多取代的相同或不同取代基取代的,其中每隔三个-
CH2-单位的基可以被O或NR″替换,n是2到10的整数,第一个和第n个马隆酸酯基的未填充价键通过与氢、具有1-20个碳原子的烃基或取代烃基,或含有未取代或取代芳基或其他环状基团的链相连;或(ii)形成具有下式的支链马隆酸酯化合物:其中Z′是具有1-30个碳原子的直链或支链脂肪族基,可以是未取代的或单取代的或多取代的相同或不同取代基取代的,其中每隔三个- -单位的基可以被O或NR″替换;n是2到10的整数;将所述马隆酸酯化合物与Cm反应,形成具有下式的加合物:其中每个Z连接到第一个马隆酸酯基和第二个马隆酸酯基的一个
羧酸基,第一个和第n个马隆酸酯基的未填充价键通过与氢、具有1-20个碳原子的烃基或取代烃基,或含有未取代或取代芳基或其他环状基团的链相连;并
水解所述加合物以形成所述化合物。