* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Reference:
[1] Bioorganic and Medicinal Chemistry, 2004, vol. 12, # 9, p. 2115 - 2137
2
[ 331-64-6 ]
[ 3522-07-4 ]
Yield
Reaction Conditions
Operation in experiment
59%
for 4 h; Reflux
Intermediate 42:[0174] A mixture of 2-fluoro-4-methoxybenzaldehyde (1 g, 6.5 mmol) and hydrazine (7 mL) was heated to reflux for 4 h. The mixture was extracted with CH2(3/4. The combined organic layers were washed with water, brine, concentrated in vacuo, and purified by column chromatography (elution with PE/EtOAc=5: l) to afford 6-methoxy-lH-indazole (intermediate 42) (568 mg, 59percent) as a yellow solid. HPLC: 99percent, RT 2.159 min. MS (ESI) m/z 149.1[M + H]+.
55.5%
at 120℃; for 30 h; Sealed tube
Step A: 2-fluoro-4-methoxybenzaldehyde (6.5 g, 42.2 mmol) and 85percent hydrazine hydrate (50 mL) were sealed at 120 ° C.The tube was stirred for 30 hours. Water (50 mL) was added and extracted with ethyl acetate (50 mL×3).The combined organic phases were washed with water (20 mL x 2). Then water (100 mL) was added to the organic phase.The pH was adjusted to 1-2 with 2M hydrochloric acid and the layers were separated and the product was taken from aqueous. The aqueous phase was adjusted to pH 8-9 with a 2M aqueous sodium sulphate solution, then extracted with ethyl acetate (50mL×3) and dried over anhydrous sodium sulfate. Evaporate the solvent under reduced pressure.The product was recrystallized from methyl tert-butyl ether / petroleum ether to give 6-methoxy-1H-carbazole (31) (3.47 g).The yield was 55.5percent.
Reference:
[1] Journal of Organic Chemistry, 2006, vol. 71, # 21, p. 8166 - 8172
[2] Journal of Medicinal Chemistry, 2011, vol. 54, # 8, p. 3076 - 3080
[3] Journal of Organic Chemistry, 2009, vol. 74, # 16, p. 6331 - 6334
[4] Patent: WO2012/3418, 2012, A2, . Location in patent: Page/Page column 73
[5] Patent: CN108727267, 2018, A, . Location in patent: Paragraph 0106; 0107; 0108
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[8] Patent: WO2014/152144, 2014, A1, . Location in patent: Paragraph 0223
3
[ 23244-88-4 ]
[ 74-88-4 ]
[ 3522-07-4 ]
Reference:
[1] Journal of Medicinal Chemistry, 2010, vol. 53, # 5, p. 2324 - 2328
[2] Bioorganic and Medicinal Chemistry, 2008, vol. 16, # 4, p. 1966 - 1982
4
[ 343773-70-6 ]
[ 3522-07-4 ]
Reference:
[1] Liebigs Annalen der Chemie, 1980, # 6, p. 908 - 927
[2] Bioorganic and Medicinal Chemistry, 2004, vol. 12, # 9, p. 2115 - 2137
5
[ 50868-72-9 ]
[ 3522-07-4 ]
Reference:
[1] Bioorganic and Medicinal Chemistry, 2004, vol. 12, # 9, p. 2115 - 2137
[2] Liebigs Annalen der Chemie, 1980, # 6, p. 908 - 927