Preparation of the tricyclo[5.3.1.1<sup>3,9</sup>]dodeca-1,5-diyl dication: attempts to prepare a novel µ-H cation
作者:C. Taeschler、M. Parvez、T. S. Sorensen
DOI:10.1002/poc.453
日期:2002.1
dication with isopentane, NaBH4 or H2, in an attempt to prepare the µ-H cation 7, did result in hydride transfer, but to the ‘outside’ face of the dication, leading to the conventional monocation 8, or rearrangement products of this. This monocation was independently prepared, and is thermally less stable than the dication, rearranging to the 2-ethyl-2-adamantyl cation (19) at −60 °C, ΔG‡ = 16.0 ± 0.6 kcal mol−1
原位制备了三环[5.3.1.1 3,9 ] dodeca-3,7-二基(6),并通过1 H和13 C NMR光谱进行了表征。为了制备µ -H阳离子7,该指示剂与异戊烷,NaBH 4或H 2的反应确实导致了氢化物转移,但转移到指示剂的“外面”,导致了常规的单阳离子8,或者重排本产品。该单阳离子是独立制备的,并且其热稳定性低于离子指示剂,在-60°C,ΔG ‡时重排为2-乙基-2-金刚烷基阳离子(19)。 = 16.0±0.6kcal mol -1。2- methyltricyclo [4.3.1.1 3,7 ]十一碳-2-基阳离子(20),在该重排的可能的中间体,也被独立地准备和显示重新排列到19,Δ ģ ‡ = 14.4±0.3千卡摩尔- 1,与8 →[ 20 ]→ 19的逐步重排过程相一致。通过高水平的从头算计算研究了药物6和单键8的结构,并进行了模型研究,以研究允许药物6等药物使用的因素。甚至准备。版权所有©2001