成功开发了Ni/( S , S )-Ph-BPE催化的α-取代α,β-不饱和膦氧化物/膦酸酯/磷酸的高效不对称加氢反应,并获得了多种手性α-取代膦加氢产物获得普遍高产率和出色的对映选择性控制(92%–99% 产率,84%−>99% ee)。该方法具有廉价的过渡金属镍催化体系、高官能团耐受性、广泛的底物范围通用性和优异的对映选择性。根据氘标记实验的结果,为这种不对称氢化提出了一个似是而非的催化循环。
3-Nitrochromenes are readily converted into 4-phosphorylchromenes on treatment with dialkylphosphite in the presence of triethylamine in 60–70% yield. This method provides a general method for the preparation of alkenyl phosphonates from nitroalkenes and dialkylphosphite.
Synthesis of Alkenylphosphonates through Palladium-Catalyzed Coupling of α-Diazo Phosphonates with Benzyl or Allyl Halides
作者:Yujing Zhou、Fei Ye、Xi Wang、Shuai Xu、Yan Zhang、Jianbo Wang
DOI:10.1021/acs.joc.5b00629
日期:2015.6.19
method for the synthesis of organophosphonates through palladium-catalyzed coupling of α-diazo phosphonates with benzyl or allyl halides has been developed. Trisubstituted alkenylphosphonates bearing versatile functional groups can be easily accessed in good yields and with excellent stereoselectivity through this method. Moreover, with similar strategy α-substituted vinylphosphonates can also be attained
Efficient Ni/(S,S)-Ph-BPE-catalyzed asymmetrichydrogenation of α-substituted α,β-unsaturated phosphine oxides/phosphonates/phosphoric acids has been successfully developed, and a wide range of chiral α-substituted phosphines hydrogenation products were obtained in generally high yields with excellent enantioselective control (92%–99% yields, 84%−>99% ee). This method features a cheap transition metal
成功开发了Ni/( S , S )-Ph-BPE催化的α-取代α,β-不饱和膦氧化物/膦酸酯/磷酸的高效不对称加氢反应,并获得了多种手性α-取代膦加氢产物获得普遍高产率和出色的对映选择性控制(92%–99% 产率,84%−>99% ee)。该方法具有廉价的过渡金属镍催化体系、高官能团耐受性、广泛的底物范围通用性和优异的对映选择性。根据氘标记实验的结果,为这种不对称氢化提出了一个似是而非的催化循环。