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Triethylamine → tert-Butyl ((4aS,5S,7aS)-7a-(5-bromo-2,4-difluorophenyl)-5-(fluoromethyl)-4a,5,7,7a-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-yl)carbamate

HRID 68379
Notes
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Reaction equation

HRID 68379 reaction equation
[Br:1][C:2]1[C:3]([F:21])=[CH:4][C:5]([F:20])=[C:6]([C@:8]23[CH2:16][O:15][C@H:14]([CH2:17][F:18])[C@H:13]2[CH2:12][S:11][C:10]([NH2:19])=[N:9]3)[CH:7]=1.[O:22](C(OC(C)(C)C)=O)[C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=O.CCN(CC)CC>C1COCC1>[Br:1][C:2]1[C:3]([F:21])=[CH:4][C:5]([F:20])=[C:6]([C@:8]23[CH2:16][O:15][C@H:14]([CH2:17][F:18])[C@H:13]2[CH2:12][S:11][C:10]([NH:19][C:23](=[O:22])[O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[N:9]3)[CH:7]=1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 90495Di-tert-butyl dicarbonateHCID 86707818(4aS,5S,7aS)-7a-(5-bromo-2,4-difluorophenyl)-5-(fluoromethyl)-4a,5,7,7a-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-amine

Product 1

HCID 86707819tert-Butyl ((4aS,5S,7aS)-7a-(5-bromo-2,4-difluorophenyl)-5-(fluoromethyl)-4a,5,7,7a-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-yl)carbamate

Reagents, catalysts & solvents 1

HCID 8028
Tetrahydrofuran
Solvent

Conditions

Temperature
100 °C

Procedure

(4aS,5S,7aS)-7a-(5-Bromo-2,4-difluorophenyl)-5-(fluoromethyl)-4a,5,7,7a-tetrahydro-4H-furo[3,4-d][1,3]thiazin-2-amine (620 mg, 1.63 mmol) was dissolved in THF (10 mL). (BOC)2O (0.45 mL, 1.95 mmol) and Et3N (0.27 mL, 1.95 mmol) were added and the reaction was stirred at 100° C. After 1 hour, the solvents were removed in vacuo. The residue was purified using column chromatography (Biotage SNAP 25 g, 20 mL/min eluting with 20-80% EtOAc in n-hexane) to leave the title compound as a foam. (704 mg). 1H NMR (400 MHz, CDCl3) δ ppm: 7.54 (t, J=1.00 Hz, 1H), 6.86-7.01 (m, 1H), 4.49-4.71 (m, 3H), 4.45 (dd, J=1.22, 8.56 Hz, 1H), 3.68-3.92 (m, 1H), 2.95-3.20 (m, 2H), 2.73 (t, J=1.00 Hz, 1H), 1.46-1.64 (m, 9H)

Workup

  1. customthe solvents were removed in vacuo
  2. customThe residue was purified
  3. washcolumn chromatography (Biotage SNAP 25 g, 20 mL/min eluting with 20-80% EtOAc in n-hexane)

Sources & evidence

ORD record
ord-3eba5390d71a4500af497243a052647f
Source dataset
uspto-grants-2014_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08822455B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes