4-Bromophenol → HCID 86698584, compound

HRID 338239Notes

Reaction equation

[OH:1][CH2:2][CH:3]1[CH2:6][N:5]([C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8])[CH2:4]1.[Br:14][C:15]1[CH:20]=[CH:19][C:18](O)=[CH:17][CH:16]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CC(OC(/N=N/C(OC(C)C)=O)=O)C>C1COCC1>[Br:14][C:15]1[CH:20]=[CH:19][C:18]([O:1][CH2:2][CH:3]2[CH2:6][N:5]([C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8])[CH2:4]2)=[CH:17][CH:16]=1

Participants

Conditions

Temperature: 110 °C

Procedure

A mixture of tert-butyl 3-(hydroxymethyl)azetidine-1-carboxylate (200 mg, 1.07 mmol), 4-bromophenol (222 mg, 1.28 mmol), triphenylphosphine (368 mg, 1.40 mmol) and DIAD (259 mg, 1.28 mmol) in anhydrous THF (5 mL) was heated to 110° C. under nitrogen for 5 hours. The reaction mixture was concentrate in vacuo to give a brown residue, which was purified by flash chromatography (petroleum ether/ethyl acetate 20:1 to 5:1) to give tert-butyl 3-[(4-bromophenoxy)methyl]azetidine-1-carboxylate (310 mg, 84%) as a white solid. 1H NMR (400 MHz, CDCl3) δ 7.38 (d, 2H), 6.78 (d, 2H), 4.06 (m, 4H), 3.79 (m, 2H), 2.96 (m, 1H), 1.45 (s, 9H).

Workup

concentrationThe reaction mixture was concentrate in vacuo
customto give a brown residue, which
customwas purified by flash chromatography (petroleum ether/ethyl acetate 20:1 to 5:1)

Sources & evidence

ORD record: ord-0cacfe7fae174785b7b417682d7a5e0d
Source dataset: uspto-grants-2014_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08889730B2

Reaction notes

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