Transition metal and base free synthesis of 2-aryl-2-oxazolines from aldehydes and β-amino alcohols catalysed by potassium iodide
作者:C. Uma Maheswari、G. Sathish Kumar、M. Venkateshwar
DOI:10.1039/c4ra08578g
日期:——
Synthesis of 2-aryl-2-oxazolines from β-amino alcohols and aldehydes was achieved in good to excellent yield by employing a potassium iodide (KI)–tert-butyl hydroperoxide (TBHP) catalytic system.
An efficient one-pot synthesis of 2-oxazolines with molecular iodine under ultrasound irradiation
作者:Nan Xiao、Sen Hao Wang、Ai Ying Zhang、Hong Yang Li、Peng Wang、Wei Li、Bao Hua Chen、Guo Feng Chen、Na Li
DOI:10.1007/s11164-015-1961-1
日期:2015.12
A series of 2-oxazolines were prepared by the condensation of aldehydes with 2-aminoethanol in the presence of molecular iodine and potassium carbonate in t-BuOH at 35–40 °C under ultrasound irradiation. The easy work-up procedure and moderate to good yields are the advantages of this methodology.
An efficient catalytic protocol based on reusable MgAl-layered double hydroxides has been developed for the synthesis of multi-functionalized oxazolines via the cyclocondensation of amidines and aminoalcohols. The developed method has a broad substrate scope and excellent functionalgroup tolerance and uses a reusable catalyst. The catalyst can be conveniently recycled by filtration and reused for
作者:Allen Martin、Kathleen Casto、William Morris、Jeremy B. Morgan
DOI:10.1021/ol202410v
日期:2011.10.21
Aziridines are important synthetic Intermediates which readily undergo ring-opening reactions. It is demonstrated that electron-rich phosphines are efficient catalysts for the regioselective rearrangement of N-acylaziridines to oxazolines. The reactions occur in excellent yield under neutral conditions. Evidence is provided for an addition/elimination mechanism by generation of a phosphonium intermediate. Similar intermediates may be useful for the development of alternate aziridine ring-opening processes and stereoselective synthesis with enantiopure phosphines.
CEMEHOB V. P.; STUDENIKOV A. N.; PROSYPKINA A. P.; OGLOBLIN K. A., ZH. ORGAN. XIMII, 1977, 13, HO 10, 2207-2212
作者:CEMEHOB V. P.、 STUDENIKOV A. N.、 PROSYPKINA A. P.、 OGLOBLIN K. A.