Silver(I) Ion-catalyzed Rearrangement of 3,5-Dehydronoriceane (Pentacyclo[5.3.1.0<sup>2,6</sup>.0<sup>3,5</sup>.0<sup>4,9</sup>]undecane). Empirical Force-field Calculations and Behavior of 3-Noricyl (Tetracyclo[5.3.1.0<sup>2,6</sup>.0<sup>4,9</sup>]undec-3-yl) Cation
作者:Takeo Katsushima、Ryohei Yamaguchi、Mituyosi Kawanisi、Eiji Osawa
DOI:10.1246/bcsj.53.3313
日期:1980.11
Acetolysis of endo-3-noricyl (endo-tetracyclo[5.3.1.02,6.04,9]undec-3-yl) tosylate (7) gives exo-3-acetoxynoriceane (exo-3-acetoxytetracyclo[5.3.1.02,6.04,9]undecane) (11), exo-4-acetoxytetracyclo[5.3.1.02,6.03,9]undecane (12), and 5 in a ratio of 36:42:22. Similar acetolysis of the exo-isomer of 7 gives the same products but in a different ratio (11:12:5=9:47:44). A stepwise carbocation mechanism
用催化量的四氟硼酸银处理 3,5-脱氢降雪烷 (1) 导致新的骨架重排,得到四环 [5.3.1.02,6.03,9]undec-4-ene (2,4-ethenonoradamantane) (5) 85% 的收率。经验力场计算表明,1 和对银 (I) 离子呈惰性的双环 [2.1.0] 戊烷之间的应变能没有显着差异。Endo-3-noricyl (endo-tetracyclo[5.3.1.02,6.04,9]undec-3-yl) tosylate (7) 的乙酰化反应得到 exo-3-acetoxynoriceane (exo-3-acetoxytetracyclo[5.3.1.02,6.04,9] ]十一烷) (11)、外型-4-乙酰氧基四环[5.3.1.02,6.03,9]十一烷(12)和5的比例为36:42:22。7 的外型异构体的类似乙酰化产生相同的产物,但比例不同(11:12:5=9:47:44)。