Direct synthesis of 2-oxazolines from carboxylic acids using 2-chloro-4,6-dimethoxy-1,3,5-triazine under mild conditions
作者:B.P Bandgar、S.S Pandit
DOI:10.1016/s0040-4039(03)00251-x
日期:2003.3
2-Acyloxy-4,6-dimethoxy-1,3,5-triazines obtained from carboxylic acids and 2-chloro-4,6-dimethoxy-1,3,5-triazine were subsequently treated with 2-amino-2-methyl-1-propanol to afford the corresponding 2-oxazolines in excellent yield at room temperature.
2-(Tributylstannyl)-4,4-dimethyl-2-oxazoline (1) reacted with aroyl chloride smoothly without any palladium catalyst to give the unusual product, bis(N-aroyl-4,4-dimethyl-2-oxazolinylidene) in good yields. The reaction of 1 with other types of halide needed a palladium catalyst, and gave the corresponding 2-substituted-4,4-dimethyl-2-oxazoline in good yields.
A novel and direct synthesis of 1,3,4-oxadiazoles or oxazolines from carboxylic acids using cyanuric chloride/indium
作者:Cyrous O. Kangani、Billy W. Day
DOI:10.1016/j.tetlet.2009.07.032
日期:2009.9
Directsynthesis of various oxazolines and 1,3,4-oxadiazoles fromcarboxylicacids was achieved using cyanuric chloride/indium under very mild conditions.
Activated α,β-unsaturated oxazolines are reactive Michael acceptors in the addition of silyl enol ethers, leading to δ-oxo acids after acidic hydrolysis.
Competition in the sodium iodide catalysed isomerisation of some aziridines
作者:Ne´ji Besbes
DOI:10.1016/s0040-4039(98)00752-7
日期:1998.6
N-Acyl-2, 2-dimethylaziridines have been shown to be isomerised by sodiumiodide into three isomers. The yield of these isomers appears to depend on the electronic effect of the acyl group.