Methyl 2-(bromomethyl)benzoate → methyl 2-[(2'-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-1'(2'H)-yl)methyl]benzoate
Reaction equation
[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[C:3]2([CH2:13][O:12][C:11]3[CH:14]=[C:15]4[C:19](=[CH:20][C:10]2=3)[CH2:18][CH2:17][O:16]4)[C:2]1=[O:21].CC1C2C=C3C4(C5C(=CC=CC=5)NC4=O)COC3=CC=2ON=1.Br[CH2:45][C:46]1[CH:55]=[CH:54][CH:53]=[CH:52][C:47]=1[C:48]([O:50][CH3:51])=[O:49].BrCC1OC(C(F)(F)F)=CC=1>>[O:21]=[C:2]1[C:3]2([CH2:13][O:12][C:11]3[CH:14]=[C:15]4[C:19](=[CH:20][C:10]2=3)[CH2:18][CH2:17][O:16]4)[C:4]2[C:9](=[CH:8][CH:7]=[CH:6][CH:5]=2)[N:1]1[CH2:45][C:46]1[CH:55]=[CH:54][CH:53]=[CH:52][C:47]=1[C:48]([O:50][CH3:51])=[O:49]Participants
Reactant 4
Product 1
Procedure
Following the procedure as described in EXAMPLE 9 and making non-critical variations using 5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2′(1′H)-one to replace 3-methylspiro[furo[3,2-f][1,2]benzisoxazole-5,3′-indol]-2′(1′H)-one, and methyl 2-(bromomethyl)benzoate to replace 2-(bromomethyl)-5-(trifluoromethyl)furan, methyl 2-[(2′-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-1′(2′H)-yl)methyl]benzoate was obtained (79%) as a colorless solid: 1H NMR (300 MHz, CDCl3) δ8.04 (dd, J=7.7, 1.3 Hz, 1H), 7.43 (ddd, J=7.5, 7.5, 1.5 Hz, 1H), 7.38-7.29 (m, 1H), 7.22-7.11 (m, 3H), 7.07-6.99 (m, 1H), 6.70 (d, J=7.7 Hz, 1H), 6.55 (s, 1H), 6.43 (s, 1H), 5.52-5.34 (m, 2H), 5.00 (d, J=8.9 Hz, 1H), 4.74 (d, J=8.9 Hz, 1H), 4.54 (t, J=8.7 Hz, 2H), 3.95 (s, 3H), 3.08-2.94 (m, 2H); 13C NMR (75 MHz, CDCl3) δ178.2, 167.5, 161.8, 161.4, 142.3, 137.5, 132.8, 132.7, 131.4, 129.1, 128.8, 128.6, 128.0, 127.4, 126.5, 123.9, 123.5, 120.2, 120.0, 119.0, 109.4, 93.3, 80.8, 72.4, 65.9, 57.9, 52.3, 42.4, 29.1, 15.3; MS (ES+) m/z 427.9 (M+1).
Sources & evidence
- ORD record
- ord-eff15fe1e89343f69a8499020161a6c8
- Source dataset
- uspto-grants-2014_12
- Patent number
- US08916580B2
Reaction notes
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