cis-1,3,6,8,10b,10c-Hexamethyl-10b,10c-dihydropyrene-2,7-dione: The Use of a Tether to Control the Stereochemistry
作者:Graham J. Bodwell、John N. Bridson、Shu-Ling Chen、Jiang Li
DOI:10.1002/1099-0690(20021)2002:2<243::aid-ejoc243>3.0.co;2-6
日期:2002.1
effort to accomplish the first synthesis of a cis-10b,10c-dimethyl-10b,10c-dihydropyrene according to our “tethered metacyclophane” strategy. The 11-step synthesis starting from 2,4,6-trimethylphenol had an overall yield of 4.1%. An X-ray crystal structure determination revealed a bowl-shaped structure and an almost fully eclipsed central ethano unit; AM1 calculations predict the heat of formation of
制备标题化合物是根据我们的“束缚的metacyclophane”策略完成第一个顺式-10b,10c-二甲基-10b,10c-二氢first合成的努力的一部分。由2,4,6-三甲基苯酚开始的11步合成的总产率为4.1%。X射线晶体结构测定显示碗形结构和中央乙醇单元几乎完全黯淡。AM1计算预测该化合物的形成热比其反式异构体高9.7 kcal mol -1。