Chloroacetic Acid → HCID 131729896, compound

HRID 886346Notes

Reaction equation

HRID 886346 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C@@H:11]([C:14]2[CH:36]=[CH:35][C:17]3[C:18]4[N:22]([CH2:23][CH2:24][O:25][C:16]=3[CH:15]=2)[CH:21]=[C:20]([C:26]2[N:27]([CH:32]([CH3:34])[CH3:33])[N:28]=[C:29]([CH3:31])[N:30]=2)[N:19]=4)[C@H:10]([OH:37])[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[Cl:57][CH2:58][C:59](O)=[O:60].N(C(OCC)=O)=NC(OCC)=O>C1COCC1>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C@H:11]([C:14]2[CH:36]=[CH:35][C:17]3[C:18]4[N:22]([CH2:23][CH2:24][O:25][C:16]=3[CH:15]=2)[CH:21]=[C:20]([C:26]2[N:27]([CH:32]([CH3:33])[CH3:34])[N:28]=[C:29]([CH3:31])[N:30]=2)[N:19]=4)[C@H:10]([O:37][C:59](=[O:60])[CH2:58][Cl:57])[CH2:9]1)=[O:7])([CH3:3])([CH3:2])[CH3:4]

Participants

6

Reactant 4

HCID 300Chloroacetic AcidHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 131729895HCID 131729895, compound

Product 1

HCID 131729896HCID 131729896, compoundYield 120.9%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Racemic-trans-3-Hydroxy-4-[2-(2-isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]-piperidine-1-carboxylic acid tert-butyl ester (0.215 g, 0.42 mmol) was suspended in dry THF (10 mL) and triphenylphosphine (0.22 g, 0.85 mmol) and chloroacetic acid (82 mg, 0.85 mmol) were added. Diethyl azodicarboxylate (0.133 mL, 0.85 mmol) was added dropwise and the mixture was stirred at room temperature for 24 h. The mixture was concentrated and the resultant residue was subjected to flash chromatography (SiO2, gradient 0-10% methanol in DCM). The resultant impure material was dissolved in dry DCM (5 mL) and triphenylphosphine, chloroacetic acid and diethyl azodicarboxylate were added (quantities as above). The mixture was stirred at room temperature for 16 hr, then concentrated in vacuo, the crude product was triturated with ether and the liquor was concentrated. The resultant residue was subjected to flash chromatography (SiO2, gradient 0-5% methanol in DCM) to give impure racemic-cis-3-(2-Chloro-acetoxy)-4-[2-(2-isopropyl-5-methyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]-piperidine-1-carboxylic acid tert-butyl ester (0.297 g), which was used in the subsequent step without further purification. LCMS RT=4.61, [M+H]+=585/587.

Workup

  1. concentrationThe mixture was concentrated
  2. dissolutionThe resultant impure material was dissolved in dry DCM (5 mL)
  3. additiontriphenylphosphine, chloroacetic acid and diethyl azodicarboxylate were added (quantities as above)
  4. stirringThe mixture was stirred at room temperature for 16 hr
  5. concentrationconcentrated in vacuo
  6. customthe crude product was triturated with ether
  7. concentrationthe liquor was concentrated

Sources & evidence

ORD record
ord-378a30f1566f4da7903fa76742e950cc
Source dataset
uspto-grants-2012_08
Patent number
US08242104B2

Reaction notes

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