Triphenylphosphine → 4-(6-Bromopyridin-3-yloxymethyl)piperidine-1-carboxylic acid isopropyl ester

HRID 423527Notes

Reaction equation

HRID 423527 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([OH:8])=[CH:4][N:3]=1.O[CH2:10][CH:11]1[CH2:16][CH2:15][N:14]([C:17]([O:19][CH:20]([CH3:22])[CH3:21])=[O:18])[CH2:13][CH2:12]1.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.N(C(OC(C)C)=O)=NC(OC(C)C)=O>C1COCC1>[Br:1][C:2]1[N:3]=[CH:4][C:5]([O:8][CH2:10][CH:11]2[CH2:16][CH2:15][N:14]([C:17]([O:19][CH:20]([CH3:22])[CH3:21])=[O:18])[CH2:13][CH2:12]2)=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 27628652-Bromo-5-hydroxypyridineHCID 57930058HCID 57930058, compound

Product 1

HCID 866387374-(6-Bromopyridin-3-yloxymethyl)piperidine-1-carboxylic acid isopropyl esterYield 58%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

1-Methylethyl 4-{[(6-bromo-3-pyridinyl)oxy]methyl}-1-piperidinecarboxylate (0.71 g, 58%) was prepared as a light yellow solid from 2-bromo-5-hydroxypyridine (0.60 g, 3.45 mmol), 1-methylethyl 4-(hydroxymethyl)-1-piperidinecarboxylate (prepared as in Example 9, Step 1, 0.71 g, 3.45 mmol) and Ph3P (0.92 g, 3.45 mmol) in THF (18 mL) followed by diisopropyl azodicarboxylate (0.75 g, 94%, 3.45 mmol) in THF (6 mL) in a manner similar to Example 1, Step 2. 1H NMR (400 MHz, CDCl3): δ 8.04 (bs, 1H), 7.36 (d, 1H, J=8.8 Hz), 7.15-7.05 (m, 1H), 4.91 (septet, 1H, J=6.2 Hz), 4.30-4.10 (m, 2H), 3.82 (d, 2H, J=6.1 Hz), 2.85-2.70 (m, 2H), 2.05-1.90 (m, 1H), 1.90-1.75 (m, 2H), 1.35-1.15 (m, 8H); LRMS (ESI), m/z 357/359 (M+H).

Sources & evidence

ORD record
ord-89d7c80c88ba400a863dc001f0d1f65c
Source dataset
uspto-grants-2012_01
Patent number
US08101634B2

Reaction notes

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