Chromatographic enantioseparation by poly(biphenylylacetylene) derivatives with memory of both axial chirality and macromolecular helicity [0.03%]
兼具轴手性和大分子螺旋性的联苯亚甲基乙炔聚合物的手性色谱拆分性能研究
Ryoma Ishidate,Tomoyuki Ikai,Shigeyoshi Kanoh et al.
Ryoma Ishidate et al.
Novel poly(biphenylylacetylene) derivatives bearing two acetyloxy groups at the 2- and 2'-positions and an alkoxycarbonyl group at the 4'-position of the biphenyl pendants (poly-Ac's) were synthesized by the polymerization of the correspond...
Yin Zhao,Lu Yin,Jingjing Liu et al.
Yin Zhao et al.
Conjugated homopolymer poly(9,9-bis(3-((S)-2-methylbutylpropanoate))fluorene) (PSF) with chiral pendants was synthesized and characterized. Dissolution experiments show that PSF is well dissolved in racemic limonene at high temperature and ...
Evaluation of the chiral recognition properties and the column performances of three chiral stationary phases based on cellulose for the enantioseparation of six dihydropyridines by high-performance liquid chromatography [0.03%]
三种纤维二糖基手性固定相的对映体拆分特性及柱性能评价高效液相色谱法拆分六种双氢吡啶类光学异构体
Jia Yu,Jing Tang,Xiaowei Yuan et al.
Jia Yu et al.
Separations of six dihydropyridine enantiomers on three commercially available cellulose-based chiral stationary phases (Chiralcel OD-RH, Chiralpak IB, and Chiralpak IC) were evaluated with high-performance liquid chromatography (HPLC). The...
Chirally sensitive collision induced dissociation of proton-bound diastereomeric complexes of tryptophan and 2-butanol [0.03%]
脯氨酸或1-叔丁基脯氨酸与手性柱[5]芳烃形成的氢键配合物的非共价色谱拆分法研究
Oleksii Rebrov,Kostiantyn Kulyk,Mauritz Ryding et al.
Oleksii Rebrov et al.
In this work we report the stereo-dependent collision-induced dissociation (CID) of proton-bound complexes of tryptophan and 2-butanol. The dissociation efficiency was measured as a function of collision energy in single collision mode. The...
Chiral exploration of 6,12-diphenyldibenzo[b,f][1,5]diazocine with stable conformation [0.03%]
具稳定构象的6,12-二苯基双环[1,5]哒嗪并[f][b]吲哚的手性研究
Zheng-Yi Li,Yong Pan,Lin-Lin Jin et al.
Zheng-Yi Li et al.
A first optical resolution of 6,12-diphenyldibenzo[b,f][1,5]diazocine with stable boat conformation was achieved by chiral supercritical fluid chromatography (SFC). The absolute configurations of enantiomers were first assigned and determin...
Enantioseparation and enantioselective behavior of trichlorfon enantiomers in sediments [0.03%]
杀螟松对映体在沉积物中的手性分离及其手性选择行为
Xiao-Feng Gao,Jing Nie,Xiao-Kun Ouyang et al.
Xiao-Feng Gao et al.
Trichlorfon (TF), an organophosphorus insecticide, has been widely used in seawater aquaculture; it is easily degraded to the highly toxic insecticide, dichlorvos (DDVP). In this study, the enantioseparation of TF enantiomers, as well as th...
Vibrational circular dichroism of a 2,5-diketopiperazine (DKP) peptide: Evidence for dimer formation in cyclo LL or LD diphenylalanine in the solid state [0.03%]
固态环LL或LD二苯丙氨酸中二聚体形成的振动圆二色证据：2,5- diketopiperazine（DKP）肽的振动圆二色谱研究
Ariel Pérez-Mellor,Anne Zehnacker
Ariel Pérez-Mellor
The diastereomer diketopiperazine (DKP) peptides built on phenylalanine, namely, cyclo diphenylalanine LPhe-LPhe and LPhe-DPhe, were studied in the solid phase by vibrational circular dichroism (VCD) coupled to quantum chemical calculations...
Homo-C-nucleoside analogs IV. Synthesis of 4-(2,5-anhydro-D-altro-pentitol-1-yl)-2-phenyl-2H-1,2,3-triazole homo-C-nucleoside. CD assignment of the absolute configuration of the carbon bridge [0.03%]
同位C核苷类似物Ⅳ.4-(2,5-无水-D-altro-五醇-1-基)-2-苯基-2H-1,2,3-三氮唑同位C核苷的合成及其碳桥绝对构型的CD圆二色性谱指认
Mohammed A E Sallam
Mohammed A E Sallam
Dehydrative cyclization of 4-(D-altro-pentitol-1-yl)2-phenyl-2H-1,2,3-triazole in basic medium with one moler equivalent of p-toluene sulfonyl chloride in pyridine solution gave the homo-C-nucleoside 4-(2,5-anhydro-D-altro-1-yl)-2-phenyl-2H...
Design of experiment assisted concurrent enantioseparation of bupropion and hydroxybupropion by high-performance thin-layer chromatography [0.03%]
手性设计实验辅助高绩效薄层色谱法同时拆分盐酸布普品酮及其代谢物羟基布普品酮映异构体的研究
Nejal M Bhatt,Vijay D Chavada,Mallika Sanyal et al.
Nejal M Bhatt et al.
A simple and efficient high-performance thin-layer chromatographic method was developed for chiral separation of rac-bupropion (BUP) and its active metabolite rac-hydroxybupropion (HBUP). Design of experiment (DoE)-based optimization was ad...
Isolation of the major chiral compounds from Bubonium graveolens essential oil by HPLC and absolute configuration determination by VCD [0.03%]
高效液相色谱拆分乳香油主要单一旋光异构体化合物并用VCD确定其绝对构型
Mohammed El-Amin Said,Isabelle Bombarda,Jean-Valère Naubron et al.
Mohammed El-Amin Said et al.
The chirality issues in the essential oils (EOs) of leaves and flowers from Bubonium graveolens were addressed by chiral high-performance liquid chromatography (HPLC) with polarimetric detection and vibrational circular dichroism (VCD). The...