4-Butylidenepiperidine → (R)-4-[3-(4-Butylidenepiperidin-1-yl)-2-methylpropyl]-6-methoxy-4H-benzo[1,4]oxazin-3-one

HRID 2103258Notes

Reaction equation

HRID 2103258 reaction equation
I[CH2:2][C@@H:3]([CH3:18])[CH2:4][N:5]1[C:10]2[CH:11]=[C:12]([O:15][CH3:16])[CH:13]=[CH:14][C:9]=2[O:8][CH2:7][C:6]1=[O:17].[CH:19](=[C:23]1[CH2:28][CH2:27][NH:26][CH2:25][CH2:24]1)[CH2:20][CH2:21][CH3:22]>CCCCCCC.CCOC(C)=O>[CH:19](=[C:23]1[CH2:28][CH2:27][N:26]([CH2:2][C@@H:3]([CH3:18])[CH2:4][N:5]2[C:10]3[CH:11]=[C:12]([O:15][CH3:16])[CH:13]=[CH:14][C:9]=3[O:8][CH2:7][C:6]2=[O:17])[CH2:25][CH2:24]1)[CH2:20][CH2:21][CH3:22]

Participants

4

Reactant 2

HCID 149666594-ButylidenepiperidineHCID 68912041(S)-4-(3-Iodo-2-methylpropyl)-6-methoxy-4H-benzo[1,4]oxazin-3-one

Product 1

HCID 68910930(R)-4-[3-(4-Butylidenepiperidin-1-yl)-2-methylpropyl]-6-methoxy-4H-benzo[1,4]oxazin-3-oneYield 87.5%

Reagents, catalysts & solvents 1

HCID 21899848Ethylacetate heptaneSolvent

Procedure

The compound (S)-4-(3-Iodo-2-methylpropyl)-6-methoxy-4H-benzo[1,4]oxazin-3-one (111MF36) (0.612 g, 1.69 mmol) and 4-butylidenepiperidine (0.212 g, 1.5 mmol) were mixed according to GP16. CC (SiO2; Heptane/EtOAc 4:1-4) gave the title compound (111MF39) (0.489 g, 77%). 1H NMR (CDCl3) δ 6.90 (d, J=8.4 Hz, 1H), 6.73 (d, J=2.8 Hz, 1H), 6.50 (dd, J=8.4 Hz, J=2.8 Hz, 1H), 5.11 (t, J=7.6 Hz, 1H), 4.54 (q, J=14.4 Hz, 2H), 3.97-3.94 (d, J=6.8 Hz, 2H), 3.78 (s, 3H), 2.48-2.41 (m, 2H), 2.33-2.23 (m, 5H), 2.20-2.13 (m, 4H), 1.96 (q, J=7.4 Hz, 2H), 1.40-1.29 (m, 2H), 0.91-0.86 (m, 6H); 13C NMR (CDCl3) δ 165.3, 155.5, 139.8, 136.5, 129.8, 122.5, 117.2, 107.0, 103.4, 68.1, 63.8, 56.5, 56.0, 55.7, 45.5, 36.2, 29.3, 29.2, 28.4, 23.3, 16.9, 13.9; HPLC-MS; (ammonium acetate) [M+H]+=373.3.

Sources & evidence

ORD record
ord-eac6ffb203af4c03a86a3e20aead9762
Source dataset
uspto-grants-2009_08
Patent number
US07576100B2

Reaction notes

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