Ethyl Acetate → (3-(4-(Hydroxymethyl)phenylthio)azetidin-1-yl)(5-phenyl-1,3,4-oxadiazol-2-yl)methanone

HRID 1035228Notes

Reaction equation

[SH:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][OH:9])=[CH:4][CH:3]=1.CS(O[CH:15]1[CH2:18][N:17]([C:19]([C:21]2[O:22][C:23]([C:26]3[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=3)=[N:24][N:25]=2)=[O:20])[CH2:16]1)(=O)=O.C([O-])([O-])=O.[Cs+].[Cs+].C(OCC)(=O)C>CN(C=O)C>[OH:9][CH2:8][C:5]1[CH:6]=[CH:7][C:2]([S:1][CH:15]2[CH2:16][N:17]([C:19]([C:21]3[O:22][C:23]([C:26]4[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=4)=[N:24][N:25]=3)=[O:20])[CH2:18]2)=[CH:3][CH:4]=1

Participants

Conditions

Temperature: 90 °C

Procedure

(4-Mercaptophenyl)methanol (2.38 g, 17.0 mmol) and 53B (5.00 g, 15.5 mmol) were mixed in DMF (80 mL). Cs2CO3 (6.05 g, 18.56 mmol) was added. The mixture was stirred at 90° C. overnight and then cooled room temperature. Ethyl acetate (150 mL) was added and the mixture was washed with water (50 mL). The aqueous layer was extracted with ethyl acetate (100 mL). The organic phases were combined, dried (MgSO4) and evaporated to dryness. The residue was purified by column chromatography eluting with ethyl acetate/heptane (20:80, 40:60 and then 60:40). There was obtained 3.5 g (61%) of 60A as a solid. 1H NMR (500 MHz, CDCl3): δ 4.19 (m, 2H), 4.64 (m, 2H), 4.69 (s, 2H), 5.10 (m, 1H), 7.34 (m, 4H), 7.53 (t, 2H), 7.59 (t, 1H), 8.15 (d, 2H), MS (APCI+) m/z 368 [M−H]+.

Workup

temperaturecooled room temperature
washthe mixture was washed with water (50 mL)
extractionThe aqueous layer was extracted with ethyl acetate (100 mL)
dry with materialdried (MgSO4)
customevaporated to dryness
customThe residue was purified by column chromatography
washeluting with ethyl acetate/heptane (20:80, 40:60

Sources & evidence

ORD record: ord-b3940f7d840c400994f2f480e58dceed
Source dataset: uspto-grants-2013_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08546375B2

Reaction notes

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