3-(tert-Butyldimethylsilyloxy)quinoline 8 on treatment with the diynene 9 gave the diynene 10(64%), and deprotection of 10 gave 11(88%) which was converted into the η2-Co2(CO)6 adduct 12; treatment of 12 with (CF3SO2)2O in CH2Cl2âMeNO2 at â10°C gave the cyclized product 13(43%), and decomplexation of 13 using I2âTHF produced the stable azabicyclo[7.3.1]tridecadiynene core structure 7 of the antitumour antibiotic dynemicin 1.
3-(叔丁基二甲基
硅氧基)
喹啉 8 经与二炔 9 反应,生成二炔 10(64%),对 10 进行去保护处理得到 11(88%),进一步转化为 η2-Co2(CO)6 加合物 12;将 12 用 (CF3SO2)2O 在
CH2Cl2–MeNO2 中于 -10°C 处理,得到环化产物 13(43%),并用 I2–THF 进行去络合处理,生成了抗肿瘤抗生素 dynemicin 1 的稳定
氮杂双环 [7.3.1]十三炔核心结构 7。