反应条件
1: (4aR,9aS)-4,4a,9,9a-tetrahydro-1-oxa-4-azafluoren-3-one; trimethyl-oxonium tetrafluoroborate in dichloromethane
T=20°C; Inert atmosphere;
2: pentafluorophenyl hydrazine in dichloromethane
T=20°C; 4 h; Inert atmosphere;
3: orthoformic acid triethyl ester in chlorobenzene
T=130°C; 72 h;
参考文献
Vora, Harit U.; Lathrop, Stephen P.; Reynolds, Nathan T.; Kerr, Mark S.; De Alaniz, Javier Read; Rovis, Tomislav; Chennamadhavuni, Spandan; Davies, Huw M. L.
Organic Syntheses, 2010 , vol. 87, p. 350 - 361