An efficient functionalization of [60]fullerene. Diels-Alder reaction using 1,3-butadienes substituted with electron-withdrawing and electron-donating (silyloxy) groups

被引:49
|
作者
Ohno, M [1 ]
Azuma, T [1 ]
Kojima, S [1 ]
Shirakawa, Y [1 ]
Eguchi, S [1 ]
机构
[1] NAGOYA UNIV, FAC ENGN, DEPT APPL ORGAN CHEM, CHIKUSA KU, NAGOYA, AICHI 46401, JAPAN
关键词
D O I
10.1016/0040-4020(96)00106-8
中图分类号
O62 [有机化学];
学科分类号
070303 ; 081704 ;
摘要
The Diels-Alder strategy was found suitable for the functionalization of C-60 using 1,3-butadienes substituted with an electron-withdrawing group as well as with an electron-donating group, giving cyclohexene-fused C-60 derivatives having ethoxycarbonyl, acetyl, cyano, phenylsulfonyl and nitro substituents. These cycloadducts were stabilized by conjugation with the substituent and no cycloreversion took place. Though the dienes are electron-deficient in nature, the HOMO (diene) - LUMO (C-60) interaction was significant as indicated by PM3 calculations. (C) 1996 Elsevier Science Ltd
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页码:4983 / 4994
页数:12
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