Triethylamine → Ethyl (1R,2R)-2-{4-cyano-7-[(3S)-3-(dimethylamino)pyrrolidin-1-yl]-5-methyl-6-phenyl-1,3-benzoxazol-2-yl}cyclopropanecarboxylate

HRID 17509Notes

Reaction equation

[C:1]([C:3]1[C:8]2[N:9]=[C:10]([C@@H:12]3[CH2:14][C@H:13]3[C:15]([O:17][CH2:18][CH3:19])=[O:16])[O:11][C:7]=2[C:6](F)=[C:5]([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[C:4]=1[CH3:27])#[N:2].C(N(CC)CC)C.[CH3:35][N:36]([CH3:42])[C@H:37]1[CH2:41][CH2:40][NH:39][CH2:38]1>CS(C)=O>[C:1]([C:3]1[C:8]2[N:9]=[C:10]([C@@H:12]3[CH2:14][C@H:13]3[C:15]([O:17][CH2:18][CH3:19])=[O:16])[O:11][C:7]=2[C:6]([N:39]2[CH2:40][CH2:41][C@H:37]([N:36]([CH3:42])[CH3:35])[CH2:38]2)=[C:5]([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)[C:4]=1[CH3:27])#[N:2]

Participants

Conditions

Temperature: 95 °C

Procedure

Ethyl (1R*,2R*)-2-[4-cyano-7-fluoro-5-methyl-6-phenyl-1,3-benzoxazole-2-yl]cyclopropanecarboxylate (I-216) (200 mg, 0.55 mmol) was dissolved in dimethyl sulfoxide (5 ml), then triethylamine (146 μl, 1.10 mmol) and (3S)-3-(dimethylamino)pyrrolidine (146 μl, 1.15 mmol) were added, followed by stirring at 95° C. for 4 hours. After cooled, this was concentrated under reduced pressure, diluted with chloroform, and washed with saturated brine. The organic layer was dried over anhydrous magnesium sulfate, then the solvent was evaporated away under reduced pressure. The resulting residue was subjected to preparative TLC. The eluate with chloroform/methanol (5:1, v/v) gave the entitled compound (105 mg, 42%) as a red brown solid.

Workup

temperatureAfter cooled
concentrationthis was concentrated under reduced pressure
additiondiluted with chloroform
washwashed with saturated brine
dry with materialThe organic layer was dried over anhydrous magnesium sulfate
customthe solvent was evaporated away under reduced pressure

Sources & evidence

ORD record: ord-5fd2e993019f4c2ea0af983b8846a64f
Source dataset: uspto-grants-2010_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07737166B2

Reaction notes

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