Time of Update: 2020-12-16
Structural heterogeneity is heterogeneous due to the different binding order and way of each atom in a molecule, including carbon frame isomer, position heterogeneity, category heterogeneity and so on.
Analysis of d--Aspartyl Isomers at Specific Sites in Proteins
Time of Update: 2020-12-15
We here describe the method to identify the specific sites ofd -β-aspartic acids inversion in proteins.
What are isomers?
Time of Update: 2020-04-03
Isomers are compounds with the same molecular formula, which means that although they are composed of the same number of atoms of the same type, they are different in spatial structure or arrangement.
synthesis strategy for solid-phase [2 + 2] photoreaction to generate pure cyclobutane isomers
Time of Update: 2020-01-17
The construction of three-dimensional organic molecules with target structure has become a new research field, and has been applied to drug discovery, material engineering
Yang Yingwei, Professor of Jilin University Research Group: non porous adaptive crystals for the separation of brominated Alkane Isomers
Time of Update: 2019-12-31
It is one of the most challenging research focuses in macrocyclic chemistry and organic supramolecular chemistry to use solid-phase host guest chemistry for high-precision
Zhang Wanbin, Professor of Shanghai Jiaotong University: the construction of stereochemistry
Time of Update: 2018-06-12
The author: Dr
Kou Xuezhen's chiral nitrogen-containing heterocyclic compounds exist in many natural products and drugs
Transition metal catalyzed
synthesis and absolute configuration determination of laingolide B isomer
Time of Update: 2018-06-02
(photo source: Organic letters) next, the author used 4-ethoxy-4-oxobutylbromide zinc (9), (s) - (-) - 3-methoxy-2-methyl-3-oxopropyl-zinc bromide (22a) and 6-ethoxy-6-oxhexyl-zinc bromide (22b) to carry out Negishi coupling reaction with (z) - silalkylated alkenyliodine (scheme 3), respectively.
Sepaflash ® C18 reversed phase purification column application case -- Separation and purification of CIS and trans isomers
Time of Update: 2018-04-11
Based on this situation, the purification personnel tried to use the rapid preparation of liquid chromatography sepabean ® machine with sepaflash ® series reversed-phase purification column to separate and purify the samples.
Synthesis of biselyngbyolide B and its c21-c22 z-isomer
Time of Update: 2018-04-06
Chem.) for the synthesis of c1-c13 fragment 10, as shown in the figure (scheme 2): the author obtained 14 from the reaction of compound 12 (org.