New one-pot, efficient, and regioselective method for the synthesis of 3-Trifluoromethyl-1H-1-phenylpyrazoles and alkyl 3-carboxylate analogs
作者:Helio G. Bonacorso、Michele S. Correa、Liliane M.F. Porte、Everton P. Pittaluga、Nilo Zanatta、Marcos A.P. Martins
DOI:10.1016/j.tetlet.2012.07.119
日期:2012.10
An efficient and regioselective procedure for the synthesis of a series of alkyl(aryl/heteroaryl) substituted 3-trifluoromethyl-1H-1-phenylpyrazoles and alkyl 3-carboxylate analogs, from the cyclocondensation reactions of 4-alkoxy-1,1,1-trihaloalk-3-en-2-ones [CX3C(O)CR2=CR1(OMe/OEt), where R1 = H, Me, Ph, 2-Furyl; R2 = H; R1-R2 = -C4H8- and X = F, Cl] and 1-phenylsemicarbazide in an acidified alcoholic
从4-烷氧基-1,1,1的环缩合反应合成一系列烷基(芳基/杂芳基)取代的3-三氟甲基-1 H -1-苯基吡唑和3-羧酸烷基酯类似物的有效和区域选择性程序-trihaloalk-3-en-2-ones [CX 3 C(O)CR 2 = CR 1(OMe / OEt),其中R 1 = H,Me,Ph,2-呋喃基;R 2= H;在酸性醇介质(R 3 OH / H 2 SO 4)中,R 1 -R 2 = -C 4 H 8-和X = F,Cl]和1-苯基氨基脲,其中R 3 = Me,Et,Pr i 已成功应用,并在此处进行了详细说明。