4H,8H-Pyrano[2,3-f]chromene-4,8-diones as versatile precursors for the synthesis of 6-(1,2-oxazol-5-yl)-2H-chromene-2-ones
摘要:
An efficient and versatile synthesis of 3-azolyl-6-(1,2-oxazol-5-yl)-2H-chromene-2-ones using a Knoevenagel reaction and subsequent cleavage with hydroxylamine hydrochloride is described.
一种使用5 H,9 H-吡喃基[2',3':5,6] chromeno [4,]的裂解合成5 H -chromeno [4,3-b] pyridin-5-one系统的替代方法3-b]吡啶-5,9-二酮与双亲核试剂
摘要:
汉奇反应已经成功地用于单步骤组装吡喃并吡啶片段,以产生5 Н,9 Н吡喃并[2' ,3' :5,6] -色烯并[4,3- b ]吡啶-5,9-用二亲核试剂处理的二酮经过化学选择性的γ-吡喃酮开环,并伴随有环化反应,形成五元环,为生成6-吡唑基(异恶唑基)-5 H -chromeno [4,3- b ]-吡啶- 5个。
Azaheterocyclic derivatives of α-pyrono[2,3-f]isoflavones
作者:T. V. Shokol、V. A. Turov、V. V. Semenyuchenko、V. P. Khilya
DOI:10.1007/s10600-006-0248-6
日期:2006.11
9-Azahetaryl-3-arylpyrano[2,3-f]chromen-4,8-diones were synthesized by condensation of 7-hydroxy-8-formylisoflavones with 2-azahetarylacetonitriles followed by acid hydrolysis.