Synthesis of 4
<i>H‐</i>
indeno[1,2‐
<i>b</i>
]thiophenes, 8
<i>H</i>
‐indeno[2,1‐
<i>b</i>
]‐thiophenes and 8
<i>H</i>
‐indeno[2,1‐
<i>b</i>
]furans having acrylic acid unit
作者:Ki Joon Jeon、Kee‐Jung Lee
DOI:10.1002/jhet.5570450252
日期:2008.3
2-(thiophen-2-yl)benzaldehyde, 2-(thiophen-3-yl)benzaldehyde or 2-(furan-3-yl)benzaldehyde with tetrabutylammonium iodide/zirconium (IV) chloride or treatment of methyl acrylate and the same aldehydes with 1,4-diazabicyclo[2,2,2]octane and triethanolamine induce an aldol-type reaction to furnish Baylis-Hillman adducts β-iodo-α-(hydroxymethyl)acrylates or α-(hydroxy-methyl)acrylates, respectively. These can be used
用碘化四丁基铵/氯化锆(IV)处理丙酸甲酯和2-(噻吩-2-基)苯甲醛,2-(噻吩-3-基)苯甲醛或2-(呋喃-3-基)苯甲醛或甲基苯丙烯酸酯和带有1,4-二氮杂双环[2,2,2]辛烷和三乙醇胺的相同醛类引发醛醇型反应,以提供Baylis-Hillman加合物β-碘-α-(羟甲基)丙烯酸酯或α-(羟甲基) )丙烯酸酯。它们可通过与硫酸在四氯甲烷中的分子内Friedel-Crafts反应用于制备具有丙烯酸单元的茚并噻吩和茚并呋喃。