Methyl 4-(bromomethyl)benzoate → methyl 4-[(2'-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-1'(2'H)-yl)methyl]benzoate

HRID 1965634Notes

Reaction equation

HRID 1965634 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][C:49]([C:50]([O:52][CH3:53])=[O:51])=[CH:48][CH:47]=1.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][C:49]([C:50]([O:52][CH3:53])=[O:51])=[CH:48][CH:47]=1

Participants

5

Reactant 4

HCID 256687Methyl 4-(bromomethyl)benzoateHCID 27946052-(Bromomethyl)-5-(trifluoromethyl)furanHCID 592633545,6-dihydro-2H-spiro[benzofuro[6,5-b]furan-3,3'-indolin]-2'-oneHCID 593524533-methylspiro[furo[3,2-f][1,2]benzisoxazole-5,3'-indol]-2'(1H)-one

Product 1

HCID 59352563methyl 4-[(2'-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-1'(2'H)-yl)methyl]benzoate

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′(1H)-one, and methyl 4-(bromomethyl)benzoate to replace 2-(bromomethyl)-5-(trifluoromethyl)furan, methyl 4-[(2′-oxo-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-1′(2′H)-yl)methyl]benzoate was obtained (95%) as a colorless solid: mp 136-140° C.; 1H NMR (300 MHz, CDCl3) δ8.01 (d, J=8.1 Hz, 2H), 7.39 (d, J=8.1 Hz, 2H), 7.17 (d, J=7.4 Hz, 2H), 7.02 (dd, J=7.4, 7.4 Hz, 1H), 6.72 (d, J=7.6 Hz, 1H), 6.48 (s, 1H), 6.44 (s, 1H), 4.99 (ABq, 2H), 4.84 (ABq, 2H), 4.54 (t, J=8.6 Hz, 2H), 3.89 (s, 3H), 3.06-2.92 (m, 2H); MS (ES+) m/z 428.1 (M+1).

Sources & evidence

ORD record
ord-9e4078e910e449c2bfa628b243aa6cb3
Source dataset
uspto-grants-2013_04
Patent number
US08415370B2

Reaction notes

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