One-Pot Synthesis of Biologically Important Spiro-2-amino-4<i>H</i>-pyrans, Spiroacenaphthylenes, and Spirooxindoles Using DBU as a Green and Recyclable Catalyst in Aqueous Medium
作者:Pooja Saluja、Komal Aggarwal、Jitender M. Khurana
DOI:10.1080/00397911.2012.760130
日期:2013.12.17
Abstract We have reported DBU-catalyzed one-pot synthesis of biologically and pharmacologically important spiropyrans from condensation of malononitrile/ethyl cyanoacetate, 1,3-dicarbonyl compounds, and ninhydrin/acenaphthequinone/istain in good yields. This new protocol employing DBU, which is a green, recyclable, and inexpensive catalyst, offers advantages such as mild reaction conditions, short
摘要 我们已经报道了 DBU 催化从丙二腈/氰基乙酸乙酯、1,3-二羰基化合物和茚三酮/苊醌/伊斯坦酮缩合合成具有生物学和药理学意义的螺吡喃,收率良好。这种采用 DBU 的新方案是一种绿色、可回收且价格低廉的催化剂,具有反应条件温和、反应时间短和易于分离产物等优点。这些结构已通过 X 射线分析得到证实。[本文提供补充材料。访问出版商的 Synthetic Communications® 在线版,获取以下免费补充资源:完整的实验和光谱细节。] 图形摘要