Butyl iodide → 7-bromo-9,9-dibutyl-9H-fluoren-2-amine
Reaction equation
[Br:1][C:2]1[CH:14]=[C:13]2[C:5]([C:6]3[CH:7]=[CH:8][C:9]([NH2:15])=[CH:10][C:11]=3[CH2:12]2)=[CH:4][CH:3]=1.I[CH2:17][CH2:18][CH2:19][CH3:20]>>[Br:1][C:2]1[CH:14]=[C:13]2[C:5]([C:6]3[CH:7]=[CH:8][C:9]([NH2:15])=[CH:10][C:11]=3[C:12]2([CH2:14][CH2:2][CH2:3][CH3:4])[CH2:17][CH2:18][CH2:19][CH3:20])=[CH:4][CH:3]=1Participants
Procedure
As shown in Scheme 3, 7-bromo-9H-fluoren-2-ylamine is reacted with 1-iodobutane to form 7-bromo-9,9-dibutyl-9H-fluoren-2-ylamine (31); and 2-Iodo-9H-fluorene is reacted with 1-iodobutane to form 9,9-dibutyl-2-iodo-9H-fluorene (32). Then, 7-bromo-9,9-dibutyl-9H-fluoren-2-ylamine (31) is reacted with 9,9-dibutyl-2-iodo-9H-fluorene (32) by Ullman coupling reaction to obtain (7-bromo-9,9-dibutyl-9H-fluoren-2-yl)-bis-(9,9-dibutyl-9H-fluoren-2-yl)amine (33). Next, (7-bromo-9,9-dibutyl-9H-fluoren-2-yl)-bis-(9,9-dibutyl-9H-fluoren-2-yl)amine (33) is reacted with 5-formyl-2-thiopheneboronic acid by Suzuki coupling reaction to obtain 5-{7-[bis-(9,9-dibutyl-9H-fluoren-2-yl)amino]-9,9-dibutyl-9H-fluoren-2-yl}-thiophene-2-carbaldehyde (34a). Finally, in acetonitrile, 5-{7-[bis-(9,9-dibutyl-9H-fluoren-2-yl)amino]-9,9-dibutyl-9H-fluoren-2-yl}-thiophene-2-carbaldehyde (34a) is reacted with cyanoacetic acid by using piperidine as a catalyst, to obtain 3-(5-{7-[bis-(9,9-dibutyl-9H-fluoren-2-yl)amino]-9,9-dibutyl-9H-fluoren-2-yl}-thiophen-2-yl)-2-cyano-acrylic acid (35a).
Sources & evidence
- ORD record
- ord-168f9d063c204903a7353e0b5be1a3e0
- Source dataset
- uspto-grants-2013_04
- Patent number
- US08419808B2
Reaction notes
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