“Stereochemical Activity” of a Lone Pair of Electrons on Low Valent Elements of the 4th Main Group: (GeNtBu)4·2 AlCl3 and (SnNtBu)4·2AlCl3
“Stereochemical Activity” of a Lone Pair of Electrons on Low Valent Elements of the 4th Main Group: (GeNtBu)4·2 AlCl3 and (SnNtBu)4·2AlCl3
复制标题
第四主族低价元素上孤电子对的“立体化学活性”：(GeNtBu)4·2 AlCl3 和 (SnNtBu)4·2AlCl3
DOI：
10.1002/anie.198502231
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发表时间：
1985
影响因子：
--
通讯作者：
W. Frank
中科院分区：
文献类型：
--
作者：
M. Veith;W. Frank
正如所预期的，新分子推进器1的光学稳定性是相当可观的，这对于实际应用是重要的，它甚至高于螺旋烯。1甚至可以在310°C下加热几分钟，这种条件导致螺旋烯的外消旋化，2也是如此。这是合理的，因为在反位的亚苯基的反转是与其他五个中的每一个相结合的，与2中独立的环反转相反。通过类似的合成策略，具有高旋光度和稳定性的其他螺旋可能是可获得的。1的脱氢产物，二菲并罗瓦烯，由于其多环芳族结构也令人感兴趣。
anti 10 SY" 9 As expected, the optical stability of the new molecular propeller 1 , which is important for practical applications"", is considerable; it is even higher than that of the helicenes. 1 even sustains heating at 310°C for several minutes-conditions that lead to the racemization of the helicenes as well as of 2. This is plausible since the inversion of a phenylene group in the anti-position is coupled with that of each of the other five, in contrast to the independent ring inversion in 2. By analogous synthetic strategy, other helices, with high optical rotation and stability, might be accessible"'! The dehydrogenation product of 1, a diphenanthroovalene, is also of interest due to its polycyclic aromatic structure.