1H and31P NMR Study of the Substituent-effects of α-Oxyalkylphosphonates

Abstract

Abstract: ¹H and ³¹P NMRspectroscopies were usedto study 21 compounds of O,O-diakylα-(2-benzoxazolyl)oxyacetoxyalkyl-phosphonate.It is indicated that the non-equivalence between the two ester OR′groups is affected by the a-substituentes.The larger the substituent is,the greater the difference of ¹H chemical shifts between the two ester OCH₃ groups is.The a and ester substituents also affected α-magnetic nuclei, that is α-Hand α-³¹P.The regular dependences of their chemical shifts, as well as their scalar coupling interaction,on thesubstituents were diseussed in detail.

Key words: NMR, Substituent effect, Phosphonate

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YAN Jiang-Li, HU Li-Ming, LIU Zhao-Jie. ¹H and³¹P NMR Study of the Substituent-effects of α-Oxyalkylphosphonates[J]. Chem. J. Chinese Universities, 1996, 17(7): 1100.

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¹H and³¹P NMR Study of the Substituent-effects of α-Oxyalkylphosphonates

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