反应详情

温度

60 °C

A suspension of the trichloro compound (22: 3.0 g, 12 mmol) in 1N NaOH (35 mL) was heated at 60° C. for 1 h. The solution was treated with decolorizing carbon and then acidified with 10% aqueous HCl. The resulting precipitate was collected and reprecipitated from dilute base with glacial acetic acid to provide 24 as orange needles (1.38g, 50%): mp. 191°-192° C.: UV λmax (pH 1) 254 nm (ε 5,300), 290 (11,400): UV λmax (pH 7,11) 226 nm (ε 28,900), 300 (14,100). Anal. Calcd. for C5HCl2N3OS: C, 27.04: H, 0.45: C1, 31.93: N, 18.93. Found: C, 26.78: H, 0.61: C1, 32.15: N, 18.66. Single crystal X-ray analysis of 24 showed the structure assignment to be correct.

1. additionThe solution was treated with decolorizing carbon
2. customThe resulting precipitate was collected
3. customreprecipitated
4. additionfrom dilute base with glacial acetic acid