Nucleophilic cycloaddition of thiocyanates 1a–e with C60 in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene afforded C60-fused 2-iminotetrahydrothiophene derivatives 2a–e and methanofullerenes 3a–d. The product distributions were highly sensitive to the substrates employed. The 2-iminotetrahydrothiophene derivatives 2a–e could be further manipulated by hydrolysis and acetylation to give 2-oxotetrahydrothiophene derivatives 4a–e and 2-acetamidotetrahydrothiophene derivatives 5a–e. A possible reaction mechanism for the formation of products 2a–e and 3a–d was proposed.
噻吩氰酸盐1a–e与C60在1,8-二氮-双环[5.4.0]十一烯存在下进行亲核环加成反应,生成C60融合的2-亚
氨基
四氢噻吩衍
生物2a–e和
甲烷全氟烯3a–d。产物分布对所采用的底物非常敏感。2-亚
氨基
四氢噻吩衍
生物2a–e可通过
水解和乙酰化进一步转化为2-氧
四氢噻吩衍
生物4a–e和2-乙酰基
四氢噻吩衍
生物5a–e。提出了生成产物2a–e和3a–d的可能反应机理。