Boron tribromide → (R)-9-(4-(1-aminopropan-2-yl)phenyl)-8-hydroxy-6-methylthieno[2,3-c]quinolin-4(5H)-one

HRID 1853818Notes

Reaction equation

C[O:2][C:3]1[CH:12]=[C:11]([CH3:13])[C:10]2[NH:9][C:8](=[O:14])[C:7]3[S:15][CH:16]=[CH:17][C:6]=3[C:5]=2[C:4]=1[C:18]1[CH:23]=[CH:22][C:21]([C@@H:24]([CH3:34])[CH2:25][NH:26]C(=O)OC(C)(C)C)=[CH:20][CH:19]=1.BrB(Br)Br>>[NH2:26][CH2:25][C@@H:24]([C:21]1[CH:20]=[CH:19][C:18]([C:4]2[C:5]3[C:6]4[CH:17]=[CH:16][S:15][C:7]=4[C:8](=[O:14])[NH:9][C:10]=3[C:11]([CH3:13])=[CH:12][C:3]=2[OH:2])=[CH:23][CH:22]=1)[CH3:34]

Participants

Reactant 2

HCID 25134Boron tribromide

HCID 67449008(R)-tert-Butyl 2-(4-(8-methoxy-6-methyl-4-oxo-4,5-dihydrothieno[2,3-c]quinolin-9-yl)phenyl)propylcarbamate

Product 1

HCID 67448836(R)-9-(4-(1-aminopropan-2-yl)phenyl)-8-hydroxy-6-methylthieno[2,3-c]quinolin-4(5H)-oneYield 52%

Procedure

Following General Procedure F, (R)-tert-butyl 2-(4-(8-methoxy-6-methyl-4-oxo-4,5-dihydrothieno[2,3-c]quinolin-9-yl)phenyl)propylcarbamate (43 mg, 0.095 mmol) was reacted with tribromoborane (1.0 M in methylene chloride, 1.0 mL, 1.0 mmol) to afford the desired product (18 mg, 51%) as a grey solid: 1H NMR (300 MHz, DMSO-d6) δ 10.75-10.65 (m, 1H), 9.14 (s, 1H), 8.09 (s, 3H), 7.68 (d, J=5.4 Hz, 1H), 7.43 (d, J=8.4 Hz, 2H), 7.21 (d, J=8.3 Hz, 2H), 7.05 (s, 1H), 5.86 (d, J=5.4 Hz, 1H), 3.27-2.95 (m, 3H), 1.38 (d, J=6.6 Hz, 3H); ESI MS m/z 365 [C21H20N2O2S+H]+; HPLC 98.6%, tR=8.42 min.

Sources & evidence

ORD record: ord-23aae854014c4cffb438fab47e7b4565
Source dataset: uspto-grants-2015_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08962648B2

Reaction notes

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