C-bis-pivot lariat ethers: Synthesis and spectral investigations on new 15- and 17-membered coronands containing dimethoxyphosphoryl groups
摘要:
The reactions of dibenzo-diaza crown ethers (coronands) (1 and 2) with dimethylphosphite led to the formation of the mixture of meso and racemic C-bis-pivot lariat ethers (3 and 4) containing dimethoxyphosphoryl groups. We have failed to make the resolution of the mixture, nevertheless, the detailed characterization and spectral investigations of compounds 3 and 4 have been made by elemental analyses, FTIR, H-1 NMR, C-13 NMR, P-31 NMR, COSY, DEPT, HETCOR and HMBC spectral data. The salient features of the spectral data of these compounds have been presented. (C) 2007 Elsevier B.V. All rights reserved.