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.
An efficient synthesis of 2-substituted oxazolines from aldehydes and 2-amino alcohol using (diacetoxyiodo)benzene as an oxidant, is reported. (Diacetoxyiodo)benzene acts as a mild dehydrogenating agent to convert the initially formed oxazolidine from aldehyde and 2-amino alcohol to furnish 2-substituted oxazoline. Similarly, 3-aminopropanol and aldehydes gives the corresponding 2-substituted oxazines
Facile Syntheses of Oxazolines and Thiazolines with <i>N</i>-Acylbenzotriazoles under Microwave Irradiation
作者:Alan R. Katritzky、Chunming Cai、Kazuyuki Suzuki、Sandeep K. Singh
DOI:10.1021/jo0355092
日期:2004.2.1
Microwave reactions of 2-amino-2-methyl-1-propanol (2) or 2-aminoethanethiol hydrochloride (4) with readily available N-acylbenzotriazoles 1a−j in the presence of SOCl2 produced 2-substituted 2-oxazolines 3a−j in 84−98% yields and 2-substituted thiazolines 5a−i in 85−97% yields, respectively. With use of this method chiral oxazoline 6, bisoxazoline 7, bisthiazoline 8, and 5,6-dihydro-4H-1,3-oxazines
在SOCl 2的存在下,2-氨基-2-甲基-1-丙醇(2)或2-氨基乙硫醇盐酸盐(4)与易于获得的N-酰基苯并三唑1a - j的微波反应产生了2-取代的2-恶唑啉3a - j分别以84-98%的产率和2-取代的噻唑啉5a - i的产率为85-97%。使用该方法时,手性恶唑啉6,双恶唑啉7,双噻唑啉8和5,6-二氢-4 H -1,3-恶嗪9或10还制备了82-96%的产率。这些结果证明了N-酰基苯并三唑在温和条件下和微波辐射下反应时间短的情况下在恶唑啉和噻唑啉制备中的新应用。
Open vessel mode microwave-assisted synthesis of 2-oxazolines from carboxylic acids
作者:Rishi Sharma、Subramanian K. Vadivel、Richard I. Duclos、Alexandros Makriyannis
DOI:10.1016/j.tetlet.2009.07.079
日期:2009.10
Microwave-assistedsynthesis of 2-oxazolines from carboxylic acids using the open vessel technique is described. This efficient method involves direct condensation of carboxylic acids with excess 2-amino-2-methyl-1-propanol at 170 °C to give the corresponding 2-oxazolines in moderate to excellent yields.
描述了使用开放容器技术从羧酸中微波辅助合成 2-恶唑啉。这种有效的方法包括在 170 °C 下将羧酸与过量的 2-氨基-2-甲基-1-丙醇直接缩合,以中等至极好的收率得到相应的 2-恶唑啉。
Tranquilizers
申请人:Commercial Solvents Corporation
公开号:US03953432A1
公开(公告)日:1976-04-27
Tranquilizing agents for warm-blooded animals corresponding to the formula ##EQU1## where n can be 1 or 2; Y can be ##EQU2## where R.sup.2 can be hydrogen or an alkyl, alkenyl, alkoxy, phenyl or methoxyphenyl radical. Z can be thienyl, furyl, phenyl; or mono-, di-, or trimethoxyphenyl; mono-, or dichlorophenyl, or dichlorophenoxy. R and R.sup.1 can be hydrogen, methyl, or ethyl and can be the same or different.