Unsymmetrically tris-bridged [2.2. 2] cyclophane. Syntheses of [2.2. 2](1, 2, 4)(1, 3, 5)-and [2.2. 2](1, 2, 4)(1, 2, 5) cyclophanes

M Nakazaki, K Yamamoto, Y Miura

文献索引：Nakazaki,M. et al. Journal of Organic Chemistry, 1978 , vol. 43, p. 1041 - 1044

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被引用次数: 19

摘要

6 7 2 235 sh (10 0301, 300 (380) 234.5 sh (10 Olo), 285.5 (640), 293.5 (530) 225 112 300), 291 (450). 304 sh (250) protons on the (1, 2, 4) deck, the peak at 6 5.88 (d) was assigned to H, again on the basis of meta coupling with Hb, and this was supported by an inspection of the molecular model which indicates H, suffers the highest shielding from the opposite (1, 3, 5) deck. Although overlapping with the Hd peak made the downfield AB quartet (Jab= 8 ...