Medium-sized cyclophanes. Part 62:<sup>1</sup> Formylation of <i>anti</i>-[<i>n</i>.2]metacyclophanes Through-space electronic interactions between two benzene rings
作者:Takehiko Yamato、Tsuyoshi Furukawa、Kan Tanaka、Tsutomu Ishi-i、Masashi Tashiro
DOI:10.1139/v03-023
日期:2003.3.1
give anti-5-tert-butyl-13-formyl-8,16-dimethyl[2.2]-meta cyclophane (7a) as well as the corresponding 2,7-di-tert-butyl-trans-10b,10c-dimethyl-10b,10c-dihydropyrene (10), anti-5-tert-butyl-8,16-dimethyl-13-(3-methyl-1-butene-2-yl)[2.2]metacyclophane (8), and anti-5,13-di-tert-butyl-exo-1-hydroxy-8,16-dimethyl[2.2]metacyclophane (9) depending on the reaction conditions. The higher yield of ipso-formylated
在 TiCl4 存在下,抗 [n.2] 间环芳烃 (1) (n = 2, 3, 4) 与二氯甲基甲醚的甲酰化选择性发生在抗 [n.2] 的内部甲基取代基的对位环芳烃。在 TiCl4 存在下,抗 5,13-二叔丁基-8,16-二甲基[2.2] 间环芳烷 (6a) 与二氯甲基甲基醚的类似反应导致叔丁基处的异甲酰化得到抗-5-叔丁基-13-甲酰基-8,16-二甲基[2.2]-间环芳烷(7a)以及相应的2,7-二叔丁基-反式-10b,10c-二甲基-10b, 10c-dihydropyrene (10), anti-5-tert-butyl-8,16-dimethyl-13-(3-methyl-1-butene-2-yl)[2.2]metacyclophane (8), and anti-5,13 -di-tert-butyl-exo-1-hydroxy-8,16-二甲基[2.2]metacyclophane