通过不同的线性环化过程,从 2-(4-oxopentyl)quinazolin-4(3 H )-ones中获得了两种 deoxyvasicinone 类似物。第一个是 1-acetyl-2,3-dihydropyrrolo[2,1- b ]quinazolin-9(1 H )-一种在碱性条件下在 I 2存在下直接环化衍生的类似物。另一种是 1-acetylpyrrolo[2,1- b ]quinazolin-9(3 H )-一种通过两步程序获得的类似物,首先在酸性条件下进行孪生二氯化,然后在对位存在的情况下形成分子内 C N 键甲苯磺酸。
Super acid catalysed sequential hydrolysis/cycloisomerization of o-(acetylenic)benzamides under microwave condition: Synthesis, antinociceptive and antiinflammatory activity of substituted isocoumarins
作者:CHANDRASEKARAN PRAVEEN、P DHEENKUMAR、P T PERUMAL
DOI:10.1007/s12039-012-0325-2
日期:2013.1
Synthesis of isocoumarins and related compounds via triflic acid promoted hydrolysis/cyclization sequence of 2-(alkynyl)benzamides under microwave condition was achieved. The substrate scope of the reaction was broad to include not only aromatic but also polyaromatic and heteroaromatic motifs, thus highlighting the significance of this methodology. One-pot operation, short reaction time, good chemical