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二维NMR的发展有助于阐明复杂的未知天然产物的结构.二维质子双量子相干(two dimentional proton double quantum cohernece或~1H-2D-INADEQUATE)是这类最新技术之一,它可用于阐明自旋偶合中小的远程偶合以及~1H-NMR的归属,从而进一步解析复杂分子中质子的连结方式.以士的宁(I)为模型,在其氢谱δ1.2至4.3ppm范围内有17个不等价质子.Dreiding模型亦表明,在其分子中有尚未报道过的几个远程偶合存在.当产生双最子相
The development of two-dimensional NMR helps to elucidate the structure of complex unknown natural products, one of the most recent of these two-dimensional proton double quantum coherence (~ 1H-2D-INADEQUATE) Spin coupling small remote coupling and ~ 1H-NMR attribution, and thus further analysis of complex proton proton molecular binding mode.Shining Ning (I) as a model, in its hydrogen spectrum δ1.2 to 4.3ppm in the range of 17 A not equivalent proton.Dreiding model also shows that in its molecules there have been several remote coupling has not been reported.When the two most sub-phase