Nickel-Catalyzed Decarboxylative C–P Cross-Coupling of Alkenyl Acids with P(O)H Compounds
作者:Yile Wu、Liu Leo Liu、Kaili Yan、Pengxiang Xu、Yuxing Gao、Yufen Zhao
DOI:10.1021/jo501321m
日期:2014.9.5
The first nickel-catalyzed decarboxylative C–P coupling of a wide range of alkenyl acids with various P(O)Hcompounds, especially for H-phosphonates, has been developed, affording a versatile and efficient tool for the preparation of valuable (E)-1-alkenylphosphonates, (E)-1-alkenylphosphinate oxides, and (E)-1-alkenylphosphine oxides with high stereoselectivity and broad substrate applicability. DFT
osmium-catalyzed dihydroxylation has uncovered that electron-deficient olefins are converted into the corresponding diols much more efficiently when the pH of the reaction medium is maintained on the acidic side. Further studies have identified citric acid as the additive of choice, for it allows preparation of very pure diols in yields generally exceeding 90%. As described here, a much wider range of olefin classes
作者:Xin Qi、Sang-Hyeup Lee、Ji Young Kwon、Youngmee Kim、Sung-Jin Kim、Yoon-Sik Lee、Juyoung Yoon
DOI:10.1021/jo034535x
日期:2003.11.1
Unexpected syn beta-amino-alpha-bromination of unsaturated phosphonates was observed under typical Sharpless AA reaction conditions with excess N-bromoacetamide.