Solvent-free route to β-enamino dichloromethyl ketones and application in the synthesis of novel 5-dichloromethyl-1<i>H</i>-pyrazoles
作者:Marcos A. P. Martins、Rodrigo L. Peres、Clarissa P. Frizzo、Elisandra Scapin、Dayse N. Moreira、Gabriela F. Fiss、Nilo Zanatta、Helio G. Bonacorso
DOI:10.1002/jhet.227
日期:2009.11
An efficient procedure to prepare a series of five 4‐amino‐1,1‐dichloro‐3‐penten‐2‐ones [CHCl2C(O)CHC(Me)NR1R2, where R1/R2 = H/Ph, H/Bn, H/CH2CH2OH, (CH2)4,(CH2)2O(CH2)2] from the solvent‐free reaction of 1,1‐dichloro‐4‐methoxy‐3‐penten‐2‐one with primary and secondary amines is reported. 1,1‐Dichloro‐4‐methoxy‐3‐penten‐2‐one was reacted with hydrazine hydrochloride, phenylhydrazine hydrochloride
制备一系列五个4-氨基-1,1-二氯-3-戊烯-2-酮的有效方法[CHCl 2 C(O)CHC(Me)NR 1 R 2,其中R 1 / R 2 = H / PH,H / BN,H / CH 2 CH 2 OH,(CH 2)4 ,(CH 2)2 O(CH 2)2]来自1,1-二氯-4-甲氧基-3-戊烯-2-的无溶剂反应与伯胺和仲胺的反应。1,1-二氯-4-甲氧基-3-戊-2-酮与盐酸肼,苯肼盐酸盐和氨基脲盐酸盐反应制得5-二氯甲基-3-甲基吡唑。氨基胍盐酸盐和1,2-二甲基肼二盐酸盐也与1,1-二氯-4-甲氧基-3-戊二-2-酮反应,得到5-二氯甲基-3-甲基吡唑啉和5-二氯甲基1,2,3-分别为三甲基氯化吡唑鎓。所有环缩合反应均按照一锅法进行。J.杂环化学,(2009)。