Solvent-controlled direct radical oxyphosphorylation of styrenes mediated by Manganese(III)
作者:Guo-Yu Zhang、Cheng-Kun Li、Da-Peng Li、Run-Sheng Zeng、Adedamola Shoberu、Jian-Ping Zou
DOI:10.1016/j.tet.2016.04.013
日期:2016.6
Direct radical oxyphosphorylation of styrenes with diarylphosphine oxides and dialkylphosphites mediated by Mn(OAc)3 is described. The solvent played a key role in this selective difunctionalization reaction.
Disclosed herein are novel prostaglandin I.sub.2 (PGI.sub.2) derivatives exhibiting excellent in vivo duration and activities, said derivatives being represented by the general formula: ##STR1## wherein R.sub.1, X, R.sub.2 and R.sub.3 are as defined herein.
Highly effective asymmetrichydrogenation of β-ketophosphonates in the presence of Ru–(S)-SunPhos as catalyst was realized; good to excellent enantioselectivities (up to 99.9% ee) and excellent diastereoselectivities (96:4) were obtained.
Ketoreductase (KRED)-catalyzed dynamic reductive kineticresolution (DYRKR) of α-substituted-β-keto arylphosphonates was developed as a generic and stereoselective approach to synthesize chiral α-substituted-β-hydroxy arylphosphonates, with moderate-to-excellent isolated yield (up to 96%), good-to-excellent diastereoselectivity (up to >99 : <1 dr), and excellent enantioselectivity (up to >99% ee) being
Iridium‐catalyzed asymmetric hydrogenation of β‐ketophosphonates with chiral ferrocenyl P,N,N‐ligands
作者:Yin‐Feng Ma、Chuan‐Jin Hou、De‐Quan Wei、Xinwei He、Ting‐Ting Chu、Xiu‐shuai Chen、Xiang‐Ping Hu
DOI:10.1002/aoc.6283
日期:2021.8
The asymmetrichydrogenation of β-ketophosphonates with chiral Ir/P,N,N-ligands catalyst has been developed. A series of β-ketophosphonates were hydrogenated, and the corresponding β-hydroxyphosphonates were obtained in high yields with good or excellent enantioselectivities under mild condition.