[EN] TECHNOLOGIES USEFUL FOR OLIGONUCLEOTIDE PREPARATION<br/>[FR] TECHNOLOGIES UTILES POUR LA PRÉPARATION D'OLIGONUCLÉOTIDES
申请人:WAVE LIFE SCIENCES LTD
公开号:WO2020191252A1
公开(公告)日:2020-09-24
Among other things, the present disclosure provides technologies for oligonucleotide preparation, particularly chirally controlled oligonucleotide preparation, which technologies provide greatly improved crude purity and yield, and significantly reduce manufacturing costs.
Substituted Cyclohexadienals - Syntheses and Applications
申请人:Watanabe Coran M. H.
公开号:US20070232813A1
公开(公告)日:2007-10-04
The present invention is generally directed to the use of L-proline and certain derivatives thereof to catalyze the asymmetric self-condensation of α,β-unsaturated aldehydes to form homodimer and heterodimer cyclohexadienals. Reaction conditions are mild and yet amenable to a variety of different substrates yielding molecules with complex scaffolds from simple precursors. This approach allows for diversification and synthesis of this structural class of compounds in sufficient quantity, purity and enantioselectivity for, e.g., biological investigations and use as fluorescent probes, anti-cancer agents, anti-bacterial agents, and/or anti-fungal agents. The present invention is also generally directed to the cyclohexadienals produced.
Binaphthyl–prolinol chiral ligands: design and their application in enantioselective arylation of aromatic aldehydes
作者:Chao Yao、Yaoqi Chen、Ruize Sun、Chao Wang、Yue Huang、Lin Li、Yue-Ming Li
DOI:10.1039/d1ob00289a
日期:——
Binaphthyl–prolinol ligands were designed and applied in enantioselective arylation of aromatic aldehydes and sequential arylation–lactonization of methyl 2-formylbenzoate. Under optimized conditions, the reactions provided the desired diarylmethanols and 3-aryl phthalides in up to 96% yields with up to 99% ee and up to 89% yields with up to 99% ee, respectively. In particular, essentially optically
联萘-脯氨醇配体被设计并应用于芳香醛的对映选择性芳基化和2-甲酰基苯甲酸甲酯的顺序芳基化-内酯化。在优化的条件下,反应分别以高达 96% 的产率和高达 99% 的 ee 和高达 89% 的产率和高达 99% 的 ee 提供了所需的二芳基甲醇和 3-芳基苯酞。特别是,通过重结晶大量获得了基本上光学纯的 3-芳基苯酞(超过 99% ee)。
Isosteric expansion of the structural diversity of chiral ligands: Design and application of proline-based N,N′-dioxide ligands for copper-catalyzed enantioselective Henry reactions
作者:En Gao、Meng Li、Lili Duan、Lin Li、Yue-Ming Li
DOI:10.1016/j.tet.2019.130492
日期:2019.9
Chiral N,N′-dioxide catalysts were designed based on isosteric approach. Using l-Proline as the starting material, a variety of chiral N,N′-dioxide ligands were obtained via conventional functional group transformations and were utilized in asymmetricHenry reactions between nitromethane and aromaticaldehydes. Using the N,N′-dioxide-copper(II) complexes as the catalysts, asymmetricHenry reaction
Binaphthyl-based chiral ligands: design, synthesis and evaluation of their performance in enantioselective addition of diethylzinc to aromatic aldehydes
作者:Chao Yao、Piao Wu、Yue Huang、Yaoqi Chen、Lin Li、Yue-Ming Li
DOI:10.1039/d0ob02127j
日期:——
the performance of binaphthyl-based chiral ligands were evaluated with computation and enantioselective addition of diethylzinc to aromatic aldehydes. Under optimized conditions, enantioselective addition of diethylzinc to aromatic aldehydes provided the desired optically active secondary alcohols in high isolated yields (up to 91%) and excellent enantiomericexcesses (up to 98% ee).