PREPARATION OF<i>N</i>-THIOAMIDO-β-LACTAM AND 2-THIOHEXAHYDROPYRIMIDIN-4-ONE DERIVATIVES FROM N-MONOSUBSTITUTED THIOUREAS AND β-HALOACYL HALIDES
作者:Tadashi Okawara、Kentaro Nakayama、Mitsuru Furukawa
DOI:10.1246/cl.1982.1791
日期:1982.11.5
The reactions of N-monosubstitued thioureas (1) with β-haloacyl halides (2) were carried out in 5% NaOH–CH2Cl2 in the presence of a phase transfer catalyst to afford N-thioamido-β-lactams (3 and 5), thioureido acids (4), and 5-hydroxy-2-thiohexahydropyrimidin-4-ones (6). The compounds, 3 and 4, were readily converted to 5,5-dimethyl-2-thiohexahydropyrimidin-4-ones (7) with 6N HC1.
N-单取代硫脲(1)与β-卤代酰卤(2)的反应在5% NaOH–CH2Cl2中的相转移催化剂存在下进行,生成N-硫酰基-β-内酰胺(3和5)、硫脲酸(4)和5-羟基-2-硫六氢嘧啶-4-酮(6)。化合物3和4可以用6N HCl方便地转化为5,5-二甲基-2-硫六氢嘧啶-4-酮(7)。