Highly enantioselective asymmetric transfer hydrogenation (ATH) of α-phthalimide ketones
作者:Zhou Xu、Yong Li、Jing Liu、Nan Wu、Ke Li、Songlei Zhu、Rongli Zhang、Yi Liu
DOI:10.1039/c5ob00568j
日期:——
A mild catalyst system for the synthesis of chiral amino alcohols via asymmetric transfer hydrogenation (ATH) of α-phthalimide ketones has been developed by using a chiral Ru-TsDPEN complex as the catalyst in DMF/MeOH at 40 °C. The reaction exhibits high reaction activity and excellent enantioselectivity where up to 96% yield and 99% ee of the product were obtained.
The imidazolering in nafimidone [1‐(2‐naphthyl)‐2‐(1‐imidazolyl)ethanone] was substituted with various groups to investigate the significance of the imidazolering in anticonvulsant activity. For this purpose, some 2‐acetylnaphthalene derivatives and their reduction products were synthesized. Several N‐alkylation methods were used to prepare 2‐acetylnaphthalenes. NaBH4 was used to synthesize their
Nafimidone [1- (2-萘基)-2- (1-咪唑基) 乙酮] 中的咪唑环被各种基团取代,以研究咪唑环在抗惊厥活性中的重要性。为此,合成了一些 2-乙酰萘衍生物及其还原产物。几种N-烷基化方法用于制备2-乙酰萘。NaBH4 用于合成它们的还原产物。这些化合物的抗惊厥活性通过抗癫痫药物开发计划的 I 期试验确定。
Ru-Catalyzed Asymmetric Hydrogenation of α-Phthalimide Ketones and 1,3-Diaryl Diketones Using 4,4‘-Substituted BINAPs
作者:Aiguo Hu、Wenbin Lin
DOI:10.1021/ol0474812
日期:2005.2.1
A family of tunable precatalysts [NH2Et2][Ru(4,4'-BINAP)Cl}(2)(mu-Cl)(3)] was synthesized and used for highly enantioselective hydrogenation of phthalimide-protected amino ketones and 1,3-diaryldiketones. The bulky groups on the 4,4'-positions of BINAP were believed to be responsible for the enhancement of enantioselectivity (and diasteroselectivity) in these reactions.
CALIS, UNSAL;DALKARA, SEVIM;ERTAN, MEVLUT;SUNAL, RUMEYSA, ARCH. PHARM., 321,(1988) N 12, C. 841-846