Treatment of 10-acetoxy-10-vinylcamphene with BF3 or HClO4 results in rearrangement to a bicyclo[3.2.1]octane derivative in preference to 5-endo-trigonal cyclization. Alkaline hydrolysis of this bicyclooctane yields a diol, crystals of which are orthorhombic, a = 9.571(1), b = 12.416(1), c = 18.860(2) Å, Z = 8, space group C2221. The structure was solved by direct methods and was refined by a full-matrix least-squares procedure to R = 0.035 and Rw = 0.044 for 930 reflections with I ≥ 3σ(I). The structure analysis has unambiguously identified the diol as 2,3-dimethyl-4-vinylbicyclo[3.2.1]octan-2,3-diol.
10-乙酰氧基-10-
乙烯基蒎烯与BF
3或HClO
4处理后,优先发生重排反应形成一种
双环[3.2.1]辛烷衍
生物,而不是5-内三元环化。对这种双
环辛烷的碱性
水解产生一种二醇,其晶体为正交晶系,a = 9.571(1) Å,b = 12.416(1) Å,c = 18.860(2) Å,Z = 8,空间群为C222
1。该结构通过直接方法解决,并通过全矩阵最小二乘法进行了精制,得到R = 0.035,R
w = 0.044,对于I ≥ 3σ(I)的930个反射。结构分析明确鉴定了二醇为2,3-二甲基-4-
乙烯基双环[3.2.1]辛烷-2,3
-二醇。