1-Bromopentane → (3R)-t-pentyl-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-one

HRID 1965574Notes

Reaction equation

HRID 1965574 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].N1C2[C:25](=[CH:26]C=CC=2)[C:24]2(COC3C=C4C(=C[C:31]2=3)CCO4)[C:23]1=O.BrCCCCC.ClCC1C=NC(OC)=NC=1>>[C:24]([N: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])([CH2:25][CH3:26])([CH3:31])[CH3:23]

Participants

5

Reactant 4

HCID 80571-BromopentaneHCID 216981735-(Chloromethyl)-2-methoxypyrimidineHCID 592633545,6-dihydro-2H-spiro[benzofuro[6,5-b]furan-3,3'-indolin]-2'-oneHCID 59352586(3R)-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-one

Product 1

HCID 71008088(3R)-t-pentyl-5,6-dihydrospiro[benzo[1,2-b:5,4-b']difuran-3,3'-indol]-2'(1'H)-one

Procedure

Following the procedure as described in EXAMPLE 5 and making non-critical variations using (3R)-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2′(1′H)-one to replace 5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2′(1′H)-one, and 1-bromopentane to replace 5-(chloromethyl)-2-methoxypyrimidine, (3R)-t-pentyl-5,6-dihydrospiro[benzo[1,2-b:5,4-b′]difuran-3,3′-indol]-2′(1′H)-one was obtained (78%) as a colorless solid: mp 128-129° C. (diethyl ether); 1H NMR (300 MHz, CDCl3) δ7.33-7.26 (m, 1H), 7.17 (d, J=7.1 Hz, 1H), 7.07-7.02 (m, 1H), 6.91 (d, J=7.8 Hz, 1H), 6.49 (s, 1H), 6.41 (s, 1H), 4.92 (d, J=8.9 Hz, 1H), 4.67 (d, J=8.9 Hz, 1H), 8.64 (t, J=4.5 Hz, 2H), 3.87-3.63 (m, 2H), 2.99 (t, J=4.5 Hz, 2H), 1.79-1.69 (m, 2H), 1.40-1.35 (m, 4H), 0.94-0.89 (m, 3H); 13C NMR (75 MHz, CDCl3) δ177.5, 161.6, 161.2, 142.4, 133.0, 128.6, 123.8, 123.0, 120.3, 119.7, 118.7, 108.4, 93.1, 80.5, 72.3, 57.6, 40.3, 29.0, 27.1, 22.3, 13.9; MS (ES+) m/z 349.9 (M+1).

Sources & evidence

ORD record
ord-f5255d6e2ea74341b2cf9cf1e4d193ad
Source dataset
uspto-grants-2013_04
Patent number
US08415370B2

Reaction notes

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