1,4-pentandien-3-ones, XXXII: Reaction of 2-acetylthiophene and 2-acetylfuran with malononitrile and aldehydes, and synthesis and properties of phenylene-bis [(thienyl/furyl)nicotinonitrile] derivative
作者:Lutz Greiner-Bechert、Hans-Hartwig Otto
DOI:10.1002/ardp.2503240908
日期:——
(1b) with aldehydes. The Michael adducts 5/6 are obtained from 3/4 by reaction with malononitrile/LDA in THF at −78°C, or in DMSO with NaH at room temp. Reaction of 3/4 with malononitrile and methylate in methanol yielded the substituted nicotinonitriles 7/8. From terephthalaldehyde, the diketones 9 are prepared, which yield with malononitrile the phenylene‐bis[(thienyl/furyl)nicotinonitrile] derivatives
(E)-1-杂芳基-2-丙烯-1-3和4是通过2-乙酰噻吩(1a、1c、1d)或2-乙酰呋喃(1b)与醛缩合制备的。迈克尔加合物 5/6 是通过与丙二腈/LDA 在-78°C 的 THF 中或在室温下与 NaH 的 DMSO 中与丙二腈/LDA 反应而获得的。3/4 与丙二腈和甲醇在甲醇中的反应产生取代的烟腈 7/8。从对苯二醛制备二酮9,其在相似条件下用丙二腈生成亚苯基-双[(噻吩基/呋喃基)烟腈]衍生物10。讨论了结构和光谱数据。