Reaction of 1,3-diaryl-2,3-dibromo-1-propanones with urea in basic and acidic medium. Synthesis of pyrimidine, imidazoline and imidazolidine derivatives
作者:E. Khalli Dora、Bhabagrahi Dash、C. S. Panda
DOI:10.1002/jhet.5570200337
日期:1983.5
Reaction of 1,3-diaryl-2,3-dibromo-1-propanones 1 with urea in basic medium afforded 4,6-diaryl-5-bromo-5,6-dihydropyrimidine-2(1H)-ones 4. Oxidation of these bromopyrimidines 4 in dimethylsulphoxide gave 4,6-diaryl-1,6-dihydropyrimidine-2,5-diones 6, which were further converted to their thione analogues 7. Reaction of 1,3-diaryl-2,3-dibromo-1-propanones 1 with urea, phenylurea and sym-diphenylurea
1,3-二芳基-2,3-二溴-1-丙烷1与尿素在碱性介质中反应,得到4,6-二芳基-5-溴-5,6-二氢嘧啶-2(1 H)-ones 4。这些溴嘧啶4在二甲基亚砜中的氧化得到4,6-二芳基-1,6-二氢嘧啶-2,5-二酮6,它们进一步转化为它们的硫酮类似物7。1,3-二芳基-2,3-二溴-1-丙烷1与尿素,苯基脲和对称-二苯基脲在冰醋酸介质中的反应可得到明显的收率4-苯基-5-α-(溴芳基甲基)咪唑啉-2-一个8和1,3-二苯基-4-芳酰基-5- arylimidazolidin -2-酮11分别。