Studies on Diphenyl Ether Derivatives. VIII. NMR Spectra and Conformational Structure of Dibenz[b, g][1, 5]oxazocine and Thiazocine Derivatives and Their Mass Spectra
作者:SATORU TANAKA、KAZUNORI HASHIMOTO、HIDEAKI WATANABE、KENYA SAKAGUCHI
DOI:10.1248/cpb.21.1683
日期:——
The NMR spectra of 6-substituted 6, 7-dihydro-5H-dibenz[b, g][1, 5]oxazocine and thiazocine derivatives (1) and the sulfoxides or sulfones (6) and the bimolecular sixteen membered ring compounds (2) were reported. The methylene protons at 5 and 7-position of the ring of 6 appeared as a AB system quartet. All ring methylene protons in 2 gave a singlet. The temperature dependent coalescence and splitting of the singals was observed in 1. At low temperature the 5, 7-methylene protons in thr ring of 1 gave a AB quartet and a singlet. From these facts it was suggested that 1 was amixture of the conformational isomer A and B in Fig. 8 and they could not freely rotate each other even at room temperaute. 6 existed only as the structure A. The Mass spectra of them were also reported.
报告了 6-取代的 6, 7-二氢-5H-二苯并[b, g][1,5]恶唑嗪和噻唑嗪衍生物(1)、硫醚或砜类化合物(6)以及双分子十六分子环化合物(2)的核磁共振谱。6 环上 5 位和 7 位的亚甲基质子以 AB 系统四元组的形式出现。2 中的所有环亚甲基质子都呈现单重子。在低温下,1 环上的 5、7-亚甲基质子产生 AB 四元体和一个单体。从这些事实可以看出,1 是图 8 中构象异构体 A 和 B 的混合物,即使在室温下也不能自由旋转。同时还报告了它们的质谱图。