Catalyst-Free and Selective C–N Bond Functionalization: Stereospecific Three-Component Coupling of Amines, Dichloromethane, and >P(O)H Species Affording α-Aminophosphorus Compounds
作者:Yalei Zhao、Xiuling Chen、Tieqiao Chen、Yongbo Zhou、Shuang-Feng Yin、Li-Biao Han
DOI:10.1021/jo501961h
日期:2015.1.2
and selective C–N bond functionalization has been achieved through three-component coupling of amines, dihalomethane, and >P(O)H species. This reaction takes place stereospecifically with retention of configuration at phosphorus, which can produce various new opticallyactive phosphorus analogues of α-amino acids.
Stereospecific Nucleophilic Substitution of Optically Pure <i>H</i>-Phosphinates: A General Way for the Preparation of Chiral P-Stereogenic Phosphine Oxides
作者:Qing Xu、Chang-Qiu Zhao、Li-Biao Han
DOI:10.1021/ja804412k
日期:2008.9.24
configurations at phosphorus to give a wide range of P-stereogenic secondary phosphineoxides and tertiary phosphineoxides, by quenching the reaction mixture with water and alkyl halides, respectively. This finding establishes a general protocol for the preparation of optically active secondary phosphineoxides and tertiary phosphineoxides from the easily accessible optically pure H-phosphinates. Mechanistic
Bronsted Acid/Organic Photoredox Cooperative Catalysis: Easy Access to Tri- and Tetrasubstituted Alkenylphosphorus Compounds from Alcohols and P–H Species
A Bronsted acid/organic photoredox cooperative catalytic system toward P–C bond formation from alcohols and P–H species is developed. With the assistance of visible light and TBHP, the reactions proceeded smoothly in an environmentally benign manner to give various alkenylphosphorus compounds in high efficiency.
Efficient Asymmetric Hydrogenation of α-Acetamidocinnamates through a Simple, Readily Available Monodentate Chiral<i>H</i>-Phosphinate
作者:Xiang-Bo Wang、Midori Goto、Li-Biao Han
DOI:10.1002/chem.201304675
日期:2014.3.24
An air‐stable, simple (RP)‐mentylbenzylphosphinate, readilyavailable in large quantities, can efficiently induce the rhodium‐catalyzed asymmetrichydrogenation of α‐acetamidocinnamates with high enantioselectivity (up to 99.6 % ee). Intramolecular hydrogen bonding plays an important role in this asymmetric induction.