Diazoaldehyde Chemistry. Part 4<i>vilsmeier-haack</i>formylation of diazo compounds: A re-investigation
作者:Özhan Sezer、Kadir Dabak、Olcay Anaç、Ahmet Akar
DOI:10.1002/hlca.19970800327
日期:1997.5.12
Diazomethyl ketones (2-diazoethanones) were reacted with the Vilsmeier reagent ((chloromethylidene)dimethylammonium chloride) to yield α-diazo-β-oxoaldehydes and chloromethyl ketones. 2′,4′-Dimethoxy-α-diazoacetophenone gave 2-chloro-1-(2,4-dimethoxyphenyl)-3-(dimethylamino)prop-2-en-1-one (5) in addition to the expected products. Phenyldiazomethanes gave the corresponding benzyl chlorides but not
使重氮甲基酮(2-重氮乙酮)与Vilsmeier试剂((氯亚甲基)二甲基氯化铵)反应,得到α-重氮-β-氧醛和氯甲基酮。除了预期的产物之外,2',4'-二甲氧基-α-二重氮苯乙酮还产生了2-氯-1-(2,4-二甲氧基苯基)-3-(二甲基氨基)丙-2-烯-1-酮(5)。苯基重氮甲烷即使在低至-60°C的温度下也能提供相应的苄基氯,但不会生成(苯基)重氮乙醛。苯基乙醛和2-叠氮基-1-乙基吡啶-1-四氟硼酸的重氮转移反应也未产生预期的(苯基)重氮乙醛。