Some cyclization and cyclocondensation reactions of 1-(5-nitro-3-furoyl)-3-(4-R-phenyl)thioureas 1a-1e (R = H, CH3, N(C2H5)2, Br, CN) were conducted. 6-R-2-(5-Nitro-3-furoylamino)benzothiazoles 2a-2c (R = H, CH3, Br) were obtained by bromine-induced cyclization of the corresponding thioureas. Reacted with bromoacetone and ω-bromoacetophenone, respectively, the derivatives 1a-1e gave 2-(4-R-phenylimino)-3-(5-nitro-3-furoyl)-4-R1-4-thiazolines 3a-3e (R = H, CH3, N(C2H5)2, Br, CN; R1 = CH3) and 3f-3j (R = H, CH3, N(C2H5)2, Br, CN; R1 = C6H5), respectively. The structure of the compounds synthesized was confirmed by IR, UV, 1H NMR and MS data.
对1-(5-硝基-3-呋喃基)-3-(4-R-苯基)硫脲类化合物1a-1e(R = H、CH3、N(C2H5)2、Br、CN)进行了一些环化和环缩合反应。通过溴诱导的对应硫脲类化合物的环化反应,得到了6-R-2-(5-硝基-3-呋喃基氨基)苯并噻唑类化合物2a-2c(R = H、CH3、Br)。分别与溴乙酮和ω-溴乙酰苯酮反应,衍生物1a-1e分别生成了2-(4-R-苯基亚胺基)-3-(5-硝基-3-呋喃基)-4-R1-4-噻唑啉类化合物3a-3e(R = H、CH3、N(C2H5)2、Br、CN;R1 = CH3)和3f-3j(R = H、CH3、N(C2H5)2、Br、CN;R1 = C6H5)。合成化合物的结构经过IR、UV、1H NMR和MS数据确认。