4-氧杂-4,5,6,7-四氢苯并[B]呋喃-3-羧酸合成路线 (共 18 条)
反应条件
1: With potassium hydroxide in methanol T=20°C; 19.5 h; 2: With sodium hydroxide in water T=20°C; 18 h;
参考文献
US2005/14939 A1, ;
Page/Page column 22 ;
US 20050014939 A1
反应条件
potassium hydroxide; sodium hydroxide in methanol; (2S)-N-methyl-1-phenylpropan-2-amine hydrate
参考文献
US5723462 A1, ;
US 5723462 A
US5750702 A1, ;
US 5750702 A
反应条件
1: With sodium hydroxide in ethanol; water T=100°C; Stetter cyclocondensation reaction; 0.333333 h; microwave irradiation; 2: With hydrogenchloride T=110°C; 0.333333 h; microwave irradiation; Further stages.;
参考文献
Tetrahedron Letters, , vol. 49, # 3 p. 459 - 462
反应条件
sulfuric acid in water 3 h; Heating; Yield given;
参考文献
Recueil des Travaux Chimiques des Pays-Bas, , vol. 109, # 4 p. 287 - 297
反应条件
1: 100 percent / KOH / methanol / Ambient temperature; overnight 2: 1M H2SO4 / H2O / 3 h / Heating View Scheme
参考文献
Recueil des Travaux Chimiques des Pays-Bas, , vol. 109, # 4 p. 287 - 297
反应条件
hydrogenchloride; potassium hydroxide 1.) methanol, 2.) 90-100 deg C, 2 h; Yield given. Multistep reaction;
参考文献
Synthetic Communications, , vol. 16, # 13 p. 1635 - 1640
反应条件
1: 1) ammonium carbonate, 2) KOH / 1) diethylene glycol, 120-130 deg C, 1h, 2) 195 deg C, 3h 2: 1a) BuLi / 1a) THF, hexane, -70 deg C, 1b) 0 deg C, 1h, 2) THF, -40 deg C 3: molsieves (3 Angstroem), DDQ / toluene / Heating; one night 4: 89 percent Chromat. / 3M NaOH / ethanol / 1) 0 deg C, 2) r.t., 3h 5: 90 percent / transformed Escherichia coli cells View Scheme
参考文献
Berg, E. M. M. van den; Jansen, F. J. H. M.; Goede, A. T. J. W. de; Baldew, A. U.; Lugtenburg, J.
Recueil des Travaux Chimiques des Pays-Bas, 1990 , vol. 109, # 4 p. 287 - 297
反应条件
p-toluenesulfonic acid monohydrate in methanol; ethyl acetate
参考文献
American Cyanamid Company
Patent: US5719278 A1, 1998 ;
US 5719278 A
反应条件
in methanol T=0 - 20°C;
参考文献
The Procter and Gamble Company
Patent: US2005/25795 A1, 2005 ;
Location in patent: Page/Page column 13 ;
反应条件
sulfuric acid 16 h; Heating;
参考文献
Piras, Leonarda; Ghiron, Chiara; Minetto, Giacomo; Taddei, Maurizio
Tetrahedron Letters, 2008 , vol. 49, # 3 p. 459 - 462