Water → 7-(1-azidoethyl)-6-(3,5-difluorophenyl)-5H-[1,3]thiazolo[3,2-a]pyrimidin-5-one

HRID 58269Notes

Reaction equation

[N:1]([CH:4]([C:6]1[N:7]=[C:8]2[S:16][CH:15]=[CH:14][N:9]2[C:10](=[O:13])[C:11]=1Br)[CH3:5])=[N+:2]=[N-:3].[F:17][C:18]1[CH:19]=[C:20](B(O)O)[CH:21]=[C:22]([F:24])[CH:23]=1.C(=O)([O-])[O-].[Na+].[Na+].O>O1CCOCC1.C(OCC)(=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[N:1]([CH:4]([C:6]1[N:7]=[C:8]2[S:16][CH:15]=[CH:14][N:9]2[C:10](=[O:13])[C:11]=1[C:20]1[CH:19]=[C:18]([F:17])[CH:23]=[C:22]([F:24])[CH:21]=1)[CH3:5])=[N+:2]=[N-:3]

Participants

Conditions

Temperature: 100 °C

Procedure

To a mixture of 7-(1-azidoethyl)-6-bromo-5H-[1,3]thiazolo[3,2-a]pyrimidin-5-one (0.50 g, 1.7 mmol) and (3,5-difluorophenyl)boronic acid (0.31 g, 2.0 mmol) in 1,4-dioxane (10 mL) was added a 1 N solution of sodium carbonate in water (2.2 mL, 2.2 mmol) and tetrakis(triphenylphosphine)palladium(0) (0.096 g, 0.083 mmol). The mixture was stirred at 100° C. overnight. After cooling, the mixture was diluted with ethyl acetate, washed with water and brine, dried over MgSO4, concentrated, and purified on silica gel (0-45% ethyl acetate/hexanes) to give the desired product (0.30 g, 53%). LCMS calculated for C14H10F2N5OS (M+H)+: m/z=334.1. Found: 334.0.

Workup

temperatureAfter cooling
washwashed with water and brine
dry with materialdried over MgSO4
concentrationconcentrated
custompurified on silica gel (0-45% ethyl acetate/hexanes)

Sources & evidence

ORD record: ord-f6c7ce50db2c4e6ab75b51330bafcd65
Source dataset: uspto-grants-2016_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09434746B2

Reaction notes

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