CuI-catalyzed diverse functionalizations of C with amino alcohols with aerobic oxygen as the sole oxidant have been explored. For 2-/3-amino alcohols, an aminooxygenation reaction occurs to generate fulleromorpholine and fullerooxazepane derivatives. When a tethered furan ring exists, a further intramolecular [4 + 2] reaction with the neighboring double bond occurs to furnish the cis-1 products. In the case of 4-/5-amino alcohols, methanofullerenes linking with cyclic amides are obtained through cyclic enamine intermediates.
The thermal reaction of C with aromatic aldehydes and inactive secondary amines for the stereoselective synthesis of trans-1,2,5-trisubstituted fulleropyrrolidines has been developed. Moreover, when an o-hydroxyl group was located at the phenyl ring of the generated fulleropyrrolidines, the Cu(OAc)-promoted regioselective intramolecular C-O coupling reaction occurred to generate unique tricycle-fused fullerene derivatives.
CuI-catalyzed reaction of C60 with tertiary amines by
using air as the sole oxidant has been developed. Spiro-linked methanofullerenes
bearing cyclic amides and fullerenoalkanals can be obtained selectively
using the cyclic and acyclic amines as starting materials, respectively.
The reactions show a wide functional group tolerance. In addition,
four ([6,6]-phenyl-C61-butyric acid methyl ester) analogues
can be easily prepared through the developed method.
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