绝对构型

植物甾醇C（24）的绝对构型

The absolute configuration at c_ ( 24 ) of Phytosterols

用X-射线晶体衍射法测定苯甲孕酮中C（22）碳原子的绝对构型

Determination of the c_ ( 22 ) absolute configuration of 16 α, 17 α - dihydroxyprogesterone acetophenide by X-ray diffraction method

NMR确定手性α-羟基酮的绝对构型

Determination of Absolute Configuration of α - Hydroxy Ketones Using NMR

通过旋光方向可以推断其C（2）的绝对构型。

Rotatory direction can be predicted from configuration , and absolute configuration of C_ (( 2 )) can be deduced from rotatory direction .

并经X-ray晶体衍射及CD谱分析修正了一枝蒿酮酸的绝对构型。

The absolute configuration of rupestonic acid was also determined as 4C by X - ray analysis and CD data .

对于绝对构型，本文通过X-射线衍射（XRD）技术、圆二色光谱（CD）技术、化学相关法和比对旋光等手段从多个角度进行了鉴定。

As for the absolute structure , it was assigned by different methods including X-ray diffraction and circular dichroism .

同时，应用CD谱测定了化合物2、5、6、7的绝对构型。

Among them , the absolute configurations of 2 , 5 , 6 and 7 were determined from their CD spectra .

目前确定手性化合物绝对构型的方法主要有X-ray单晶衍射、结构衍生化、旋光色散方法等。

Currently , the dominating methods to determine the absolute configuration include X-ray diffraction , rotary dispersion , derivate of the structure and so on .

由计算结果推测该化合物分子结构中C（2）上的H在β位，即C（2）的绝对构型为S型。

The results show that the atom H at C ( 2 ) is β - H , so the absolute configuration of the compound is the S conformer .

利用X射线单晶衍射分析以及旋光度比较分析确定了不对称烯丙基化产物的绝对构型。

Besides , the absolute configurations of the asymmetric allylation adducts were confirmed by the single-crystal X-ray diffraction analysis and the comparation of the optical rotation .

此外，发现中心手性起到了决定产物ee值和绝对构型的作用，平面手性和中心手性的匹配在取得高对映选择性上是重要的。

However , the match between planar chirality and central chirality is critical for high enantioselectivity .

用单晶X衍射测定了酮咯酸脯氨酸苄酯酰胺一个异构体的晶体结构，并用内参法确定了其绝对构型。

The crystal structure of one diastereoisomer of the amides was determined by single crystal diffraction analysis , and the absolute configuration of which was deduced by internal reference .

通过化学相关法确定了1的绝对构型为（－）－（S）和（＋）－（R）。

The absolute configuration of the optically active 1 has been established as ( ) - ( S ) and ( + ) - ( R ) by the chemical correlation method .

应用羰基的八区律、内酯的手性规则和内酯的扇形规则，所预测的这些化合物的cotton效应与实测结果一致，从而指定了它们的绝对构型。

By-using ketone octant rule , lactone chirality rule and lactone sector rule , the predicted cotton effects of these compounds coincided with the result of determination and so the absolute configurations were assigned .

分子旋光度的密度泛函计算及Soman绝对构型确定

Calculation of Optical Rotation Using Density Functional Theory and Determination of Absolute Configuration for Soman Molecular Selection

C-11绝对构型的测定结果经X-射线衍射测定进一步得以肯定。

The result was confirmed by X-ray diffraction analysis .

并按Mosher方法确定了具有代表性的化合物的绝对构型，由此提出了该重排反应的机理。

Based on the Mosher ' method , the absolute configuration of the typical product was determined . A reaction mechanism was proposed according to the controlling stereochemistry of the product . 2 .

通过X-衍射方法，确定了其绝对构型。

It 's absolute configuration was confirmed by X-ray crystallographic analysis .

分子的绝对构型是用反常散射法确定的。

Absolute configuration of molecule was determined by anomalous scattering method .

应用核磁共振测定有机化合物绝对构型的方法

Methods to determine the absolute stereochemistry of organic compounds by NMR spectroscopy

产物的绝对构型通过X-射线单晶结构分析进行了确认。

The configuration of the product was unambiguously confirmed by X-ray analysis .

目标化合物中磷原子的绝对构型为S。

The absolute configuration of the phosphorus in the title compound is S.

胡蔓藤碱乙氢溴酸盐结构和绝对构型的测定

Determination of Structure and Absolute Configuration of Humantenine Hydrobromide

其中化合物6的绝对构型经X-射线单晶衍射确证。

The absolute configuration of compound 6 was confirmed by X-ray crystallographic analysis .

天然产物绝对构型的测定

Advances in determining the absolute configuration of natural products

通过单晶衍射，我们确定了化合物的绝对构型。

The absolute configuration was determined by X-ray diffraction .

包甲素类似物的绝对构型研究

Studies on Absolute Configurations of Analogs of Baogongteng-A

奇蒿内酯晶体结构及绝对构型的测定

The crystal structure and absolute configuration of arteanomalactone

根据螺旋理论推断有机化合物的绝对构型

The Prediction of the Absolute Configuration of Organic Compound on the Basis of the Helix Theory

但性信息素羧基部分碳链上两个甲基的绝对构型尚未确定。

However , the absolute configurations of the two methyls of C have not been identified .