Base-mediated cyclization reaction of 2-alkynylphenylphosphine oxides: synthesis and photophysical properties of benzo[b]phosphole oxides.
The base-mediated intramolecular cyclization reaction of 2-alkynylphenylphosphine oxides affords benzo[ b]phosphole oxides, which show intense blue-green fluorescence. Benzo[ b]phospholes are also prepared by the reduction of benzo[ b]phosphole oxides.
Sanji
Takanobu
T
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259-R1-13, Nagatsuta, Midori-ku, Yokohama 226-8503, Japan. sanji@res.titech.ac.jp
Shiraishi
Kentaro
K
Kashiwabara
Taigo
T
Tanaka
Masato
M