dicyclohexylammonium salt of α-mercapto-α'-formylstilbene 、 丙烯醛 以
甲醇 为溶剂,
反应 1.0h,
以86%的产率得到5,6-Diphenyl-2H-thiopyran-3-carbaldehyde
参考文献:
名称:
Die Synthese von 2H-Thiopyranen aus β-Thioxoaldehyden
摘要:
从 ß-Thioxoaldehydes 合成 2H-Thiopyranes [4+2]-Cycloaddition reactions between enaminothioketones and activated alkenes,which are described by Quiniou et al.以单硫代-ß-二羰基化合物的二环己基铵盐和不饱和醛或酮为起点,合成 3-acyl-2H-thiopyranes 的新方法可以获得更好的结果。这种新反应的机理是先发生迈克尔加成反应,然后发生醛醇反应。
作者:GREIF, D.、PULST, M.、TEICHERT, J.、WEISSENFELS, M.
DOI:——
日期:——
GREIF D.; PULST M.; WEISS. ENFELS, M., SYNTHESIS,(1987) N 5, 456-460
作者:GREIF D.、 PULST M.、 WEISS. ENFELS, M.
DOI:——
日期:——
Die Synthese von 2<i>H</i>-Thiopyranen aus β-Thioxoaldehyden
作者:D. Greif、M. Pulst、M. Weißenfels
DOI:10.1055/s-1987-33432
日期:——
The Synthesis of 2H-Thiopyranes from ß-Thioxoaldehydes [4+2]-Cycloaddition reactions between enaminothioketones and activated alkenes, which are described by Quiniou et al.,1-4 usually require relatively harsh reaction conditions, and produce the title compounds only in moderate yields. Much better results can be achieved by a new synthesis of 3-acyl-2H-thiopyranes starting with dicyclohexylammonium salts of monothio-ß-dicarbonyl compounds and unsaturated aldehydes or ketones. The mechanism of this new reaction is characterized by Michael addition followed by an aldol reaction.
从 ß-Thioxoaldehydes 合成 2H-Thiopyranes [4+2]-Cycloaddition reactions between enaminothioketones and activated alkenes,which are described by Quiniou et al.以单硫代-ß-二羰基化合物的二环己基铵盐和不饱和醛或酮为起点,合成 3-acyl-2H-thiopyranes 的新方法可以获得更好的结果。这种新反应的机理是先发生迈克尔加成反应,然后发生醛醇反应。