共查询到19条相似文献,搜索用时 78 毫秒
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手性茂金属催化剂在不对称硅氢化反应中的应用 总被引:2,自引:0,他引:2
手性茂金属催化剂在不对称硅氢化反应中的应用研究近扯为取得了很大进展。对90年代以来具有高手性诱导效应的手性二茂铁络合催化剂及手性二茂钛系催化剂进行了重点评述,并展望了其应用研究前景。 相似文献
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Chen Jianzhong Butt Nicholas A. Zhang Wanbin 《Research on Chemical Intermediates》2019,45(12):5959-5974
Research on Chemical Intermediates - This paper summarizes the application of the chiral ligand DTBM-SegPHOS in asymmetric catalytic hydrogenation reactions. DTBM-SegPHOS exhibits pronounced... 相似文献
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A novel chiral phosphinediamine ligand (PN2) was prepared from (S)-1-phenylethylamine and dichloroisopropylphosphine. The rhodium-PN2 catalyst utilizing selective ligation of the amino unit and electrostatic interaction between the ligand and a substrate gave high enantioselectivities up to 92% ee in asymmetric hydrogenations of acrylic acid derivatives. 相似文献
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Bao-De Ma Sheng-Hua Du Yu Wang Xiao-Ming Ou Ming-Zhi Huang Li-Xin Wang Xiao-Guang Wang 《Tetrahedron: Asymmetry》2017,28(1):47-53
5-Aryl substituted chiral hydantoin derivatives were synthesized via asymmetric hydrogenation of prochiral exocyclic alkenes using a Pd/BINAP catalyst. Moderate to good enantioselectivity were obtained (21–90% ee). A chiral Brönsted acid additive was found to be a key factor to obtain high enantioselectivity. 相似文献
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A new chiral sulfinyl-NH-pyridine ligand for Ir-catalyzed asymmetric transfer hydrogenation reaction
Lei Tang Qiwei WangJuanjuan Wang Zechao Lin Xiaobei Wang Linfeng CunWeicheng Yuan Jin ZhuJian Liao Jingen Deng 《Tetrahedron letters》2012,53(30):3839-3842
A new flexible C1-symmetric tridentate ligand (S)-N-(2-(tert-butylsulfinyl)benzyl)-1-(pyridin-2-yl)methanamine sulfoxide (L1) was successfully prepared and utilized as a chiral ligand for Ir(I)-catalyzed ATH (asymmetric transfer hydrogenation) reactions. Without any cooperation of other chiral center, encouraging ee and conversion values have been achieved, which provide us a better understanding on these types of ligands and a new strategy to develop new high-efficiency chiral catalysts for asymmetric reaction. 相似文献
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Yaping Zou Huiling Geng Weicheng Zhang Shichao Yu Xumu Zhang 《Tetrahedron letters》2009,50(42):5777-5779
A new electron-rich TunePhos type ligand has been synthesized; excellent enantioselectivities (up to 99% ee) have been achieved in Rh-catalyzed asymmetric hydrogenation of α-dehydroamino acid methyl esters and dimethyl itaconate. 相似文献