Convenient synthesis of 2-Amino-4H-chromenes from photochemically generated o-quinone methides and malononitrile
2-Amino-4H-chromenes were synthesized in moderate to good yields by the reaction of o-quinone methides photochemically generated from o-(dimethylaminomethyl)phenols with malononitrile. This method was applicable to the synthesis of fluorinated chromenes that were difficult to obtain by other methods. In addition, o-(hydroxymethyl)phenols could be used for the reaction in the presence of tertiary amine bases.
Fujiwara, Makoto,Sakamoto, Masanori,Komeyama, Kimihiro,Yoshida, Hiroto,Takaki, Ken
p. 59 - 66
(2015/01/30)
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