<i>N</i>-Methylimidazole-Promoted Efficient Synthesis of Functionalized 1,3-Oxazoline-2-thiones under Solvent-Free Conditions
作者:Issa Yavari、Zinatossadat Hossaini、Sanaz Souri、Maryam Sabbaghan
DOI:10.1055/s-2008-1078403
日期:2008.5
An efficient synthesis of ethyl 2-thioxo-2,3-dihydro-1,3-oxazole-5-carboxylates or ethyl 5-methyl-2-thioxo-2,3-dihydro-1,3-oxazole-4-carboxylates, under solvent-free conditions, is described via reaction between ammonium thiocyanate, acid chlorides, and ethyl bromopyruvate or ethyl 2-chloroacetoacetate in the presence of N-methylimidazole.
2-thioxo-2,3-dihydro-1,3-oxazole-5-carboxylates 或 5-methyl-2-thioxo-2,3-dihydro-1,3-oxazole-4-carboxylates 的有效合成,在无溶剂条件下,通过硫氰酸铵、酰氯和溴丙酮酸乙酯或 2-氯乙酰乙酸乙酯在 N-甲基咪唑存在下的反应进行描述。