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1,1'-Carbonyldiimidazole → tert-butyl [(1R,2S)-2-ethenyl-1-{[(1-methylcyclopropyl)sulfonyl]carbamoyl}cyclopropyl]carbamate

HRID 1481641
Notes
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Reaction equation

HRID 1481641 reaction equation
[C:1]([O:5][C:6]([NH:8][C@:9]1([C:14]([OH:16])=O)[CH2:11][C@H:10]1[CH:12]=[CH2:13])=[O:7])([CH3:4])([CH3:3])[CH3:2].C1N=CN(C(N2C=NC=C2)=O)C=1.[CH3:29][C:30]1([S:33]([NH2:36])(=[O:35])=[O:34])[CH2:32][CH2:31]1.C1CCN2C(=NCCC2)CC1>C1COCC1>[C:1]([O:5][C:6](=[O:7])[NH:8][C@:9]1([C:14](=[O:16])[NH:36][S:33]([C:30]2([CH3:29])[CH2:32][CH2:31]2)(=[O:35])=[O:34])[CH2:11][C@H:10]1[CH:12]=[CH2:13])([CH3:2])([CH3:3])[CH3:4]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 4

HCID 682631,1'-CarbonyldiimidazoleHCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 10376443(1R,2S)-1-(((1,1-Dimethylethoxy)carbonyl)amino)-2-ethenylcyclopropanecarboxylic acidHCID 218898141-Methylcyclopropane-1-sulfonamide

Product 1

HCID 56605353tert-butyl [(1R,2S)-2-ethenyl-1-{[(1-methylcyclopropyl)sulfonyl]carbamoyl}cyclopropyl]carbamate
Yield 58.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
85 °C

Procedure

To a solution of (1R,2S)-1-(tert-butoxycarbonylamino)-2-vinylcyclopropanecarboxylic acid (25 g, 110 mmol) in THF (300 mL) was added CDI (205 g, 127 mmol) and the reaction mass was heated at 85° C. for 1 h. The reaction mass was cooled to rt and to this reaction mass was added 1-methylcyclopropane-1-sulfonamide (17.7 g, 131 mmol) followed by DBU (33.2 mL, 33.5 mmol). The reaction mixture was stirred at rt for 18 h. The solvent was evaporated under reduced pressure and the residue was diluted with water and acidified to pH˜2 by using aq. 1.5 N HCl solution. The precipitated solid was isolated via filtration and washed with water to get desired compound (22 g, 58%) as off-white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 11.01-11.17 (m, 1H), 7.17-7.33 (m, 1H), 5.35-5.51 (m, 1H), 5.18-5.29 (m, 1H), 4.99-5.09 (m, 1H), 2.21 (s, 1H), 1.69 (dd, J=7.78, 5.27 Hz, 1H), 1.40 (d, J=3.01 Hz, 14H), 1.20 (dd, J=9.29, 5.27 Hz, 1H), 0.82-0.96 (m, 2H). MS: MS m/z 343 (M++1).

Workup

  1. temperatureThe reaction mass was cooled to rt and to this reaction mass
  2. customThe solvent was evaporated under reduced pressure
  3. additionthe residue was diluted with water
  4. customThe precipitated solid was isolated via filtration
  5. washwashed with water

Sources & evidence

ORD record
ord-35dbc0688652479292e2cf8e7b0beaa7
Source dataset
uspto-grants-2016_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09409943B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes