2-氨基-4,5-二氢-3-呋喃甲酰胺在乙酸存在下于吡啶中或在乙酸铵的影响下与吗啉反应生成相应的3-二氨基亚甲基-4,5-二氢-2(3 H )-呋喃酮; 没有分离出4,5-二氢-2-吗啉代-3-呋喃甲酰胺。前者之一与苄基胺反应生成( E )-和( Z )-3-(氨基-(苄基氨基)-亚甲基)-4,5-二氢-4-苯基-2(3 H )-呋喃酮和2-苄氨基-4,5-二氢-4-苯基-3-呋喃甲酰胺。
2-氨基-4,5-二氢-3-呋喃甲酰胺在乙酸存在下于吡啶中或在乙酸铵的影响下与吗啉反应生成相应的3-二氨基亚甲基-4,5-二氢-2(3 H )-呋喃酮; 没有分离出4,5-二氢-2-吗啉代-3-呋喃甲酰胺。前者之一与苄基胺反应生成( E )-和( Z )-3-(氨基-(苄基氨基)-亚甲基)-4,5-二氢-4-苯基-2(3 H )-呋喃酮和2-苄氨基-4,5-二氢-4-苯基-3-呋喃甲酰胺。
The reaction of lactonization of olefins with carboxyalkyl radicals and Mn(OAc)3 was carried out under ultrasound irradiation at low temperatures Good yields of lactones were obtained in short reaction times. In sonochemical conditions, reoxidation of Mn(II) occurred, allowing the development of a lactonization procedure with a catalytic amount of Mn(III).
Simple Efficient Routes for the Preparation of Pyrazoleamines and Pyrazolopyrimidines: Regioselectivity of Pyrazoleamines Reactions with Bidentate Reagents
作者:Moustafa Sherief Moustafa、Saleh Mohammed Al-Mousawi、Mohamed Hilmy Elnagdi
DOI:10.5562/cca2738
日期:——
Simple and efficient routes for the preparation of 2-amino-5-phenyl-4,5-dihydrofuran-3-carbonitrile (12), 2-oxo-5-phenyl-tetrahydrofuran-3-carbonitrile (13) and the 3,5-diaminopyrazole derivative 2h were developed. The results of the reactivity profiles of 12 and 2h are reported and the previously investigated reaction of pyrazole-3,5-diamine (2b) with acrylonitrile to yield compound (31), a N-1 acylation product, is currently justified by using X-ray crystallographic analysis. Taken together, the observation of alkenes and alkynes substitution when reacting with 3,5-diaminopyrazole derivative 2h is explained by the terminal electron withdrawing group. This pattern of substitution is attributed to involvement of sterically unhindered electrophiles primarily at the N-1 position.
Linstead; Williams, Journal of the Chemical Society, 1926, p. 2745
作者:Linstead、Williams
DOI:——
日期:——
Hashem, A. I.; Shaban, M. E., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1981, vol. <B> 20, # 9, p. 807 - 808