Stereoselective Synthesis of Fluoroalkenoates and Fluorinated Isoxazolidinones: N-Substituents Governing the Dual Reactivity of Nitrones
作者:G. K. Surya Prakash、Zhe Zhang、Fang Wang、Martin Rahm、Chuanfa Ni、Marc Iuliucci、Ralf Haiges、George A. Olah
DOI:10.1002/chem.201303509
日期:2014.1.13
α‐Fluoroalkenoates and 4‐fluoro‐5‐isoxazolidinones are of vast interest due to their potential biological applications. We now demonstrate the syntheses of (E)‐α‐fluoroalkenoates and 4‐fluoro‐5‐isoxazolidinones by the reactions between nitrones and α‐fluoro‐α‐bromoacetate. By altering N‐substituents in nitrones, (E)‐α‐fluoroalkenoates and 4‐fluoro‐5‐isoxazolidinones can be achieved, respectively, with
Elkik, Elias; Francesch, Charlette, Bulletin de la Societe Chimique de France, 1986, # 3, p. 423 - 428
作者:Elkik, Elias、Francesch, Charlette
DOI:——
日期:——
A convenient palladium-catalyzed synthesis of α-fluoro-α,β-unsaturated esters
作者:Yanchang Shen、Yuefen Zhou
DOI:10.1016/s0022-1139(00)80109-8
日期:1993.4
During the treatment of ethyl alpha-fluoro-alpha-iodoacetate with aldehydes in the presence of tri-n-butylarsine and a catalytic amount (10 mol%) of Pd(PPh3)4, the aldehydes were eventually completely consumed and alpha-fluoro-alpha,beta-unsaturated esters were obtained in 52-90% yield.
Fluorine-19 nuclear magnetic resonance study of the inclusion of fluoro- and difluoro-trans-cinnamates by α-cyclodextrin
作者:Ian M. Brereton、Thomas M. Spotswood、Stephen F. Lincoln、Evan H. Williams
DOI:10.1039/f19848003147
日期:——
19 F n.m.r. studies of the inclusion of o-, m-, p- and α-fluoro-trans-cinnamates and o, p- and α,p-difluoro-trans-cinnamates by α-cyclodextrin (αCD) have shown that two inclusion equilibria [graphic omitted] are established in D2O solution at pD = 8.5 ± 0.1. Typically at 294 K, K1= 111 ± 13 dm3 mol–1 and K2= 23 ± 2 dm3 mol–1 for α,p-difluoro-trans-cinnamate. Chemical-shift and other data indicate that