1-Hydroxybenzotriazole → Tert-butyl (6'-{[(5-chloropyridin-2-yl)carbonyl]amino}-2',2'-dimethyldispiro[1,3-oxazole-4,4'-chromene-3',3''-oxetan]-2-yl)carbamate

HRID 873710Notes

Reaction equation

HRID 873710 reaction equation
[NH2:1][C:2]1[CH:3]=[C:4]2[C:24](=[CH:25][CH:26]=1)[O:23][C:22]([CH3:28])([CH3:27])[C:18]1([CH2:21][O:20][CH2:19]1)[C:5]12[CH2:9][O:8][C:7]([NH:10][C:11](=[O:17])[O:12][C:13]([CH3:16])([CH3:15])[CH3:14])=[N:6]1.[Cl:29][C:30]1[CH:31]=[CH:32][C:33]([C:36](O)=[O:37])=[N:34][CH:35]=1.Cl.CN(C)CCCN=C=NCC.ON1C2C=CC=CC=2N=N1.C(N(CC)C(C)C)(C)C>C(Cl)Cl>[Cl:29][C:30]1[CH:31]=[CH:32][C:33]([C:36]([NH:1][C:2]2[CH:3]=[C:4]3[C:24](=[CH:25][CH:26]=2)[O:23][C:22]([CH3:28])([CH3:27])[C:18]2([CH2:21][O:20][CH2:19]2)[C:5]23[CH2:9][O:8][C:7]([NH:10][C:11](=[O:17])[O:12][C:13]([CH3:16])([CH3:14])[CH3:15])=[N:6]2)=[O:37])=[N:34][CH:35]=1

Participants

7

Reactant 5

HCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 27628725-Chloro-2-picolinic acidHCID 86724249Tert-butyl (6'-amino-2',2'-dimethyldispiro[1,3-oxazole-4,4'-chromene-3',3''-oxetan]-2-yl)carbamate

Product 1

HCID 86724252Tert-butyl (6'-{[(5-chloropyridin-2-yl)carbonyl]amino}-2',2'-dimethyldispiro[1,3-oxazole-4,4'-chromene-3',3''-oxetan]-2-yl)carbamateYield 82%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

A mixture of tert-butyl (6′-amino-2′,2′-dimethyldispiro[1,3-oxazole-4,4′-chromene-3′,3″-oxetan]-2-yl)carbamate (878 mg, 2.25 mmol), 5-chloro-2-pyridinecarboxylic acid (476 mg, 2.93 mmol), N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (562 mg, 2.93 mmol), 1-hydroxybenzotriazole (396 mg, 2.93 mmol), N,N-diisopropylethylamine (0.502 mL, 2.93 mmol) and CH2Cl2 (8.78 mL) was stirred for 1.5 hours at ambient temperature. After concentration of the reaction mixture at reduced pressure, the residue was purified with column chromatography on silica gel (hexane-EtOAc, a linear gradient of EtOAc from 0 to 90%) to give tert-butyl (6′-{[(5-chloropyridin-2-yl)carbonyl]amino}-2′,2′-dimethyldispiro[1,3-oxazole-4,4′-chromene-3′,3″-oxetan]-2-yl)carbamate (976 mg).

Workup

  1. customAfter concentration of the reaction mixture at reduced pressure, the residue was purified with column chromatography on silica gel (hexane-EtOAc

Sources & evidence

ORD record
ord-e3b98591eda44e838819c0366e90fdc1
Source dataset
uspto-grants-2015_03
Patent number
US08975415B2

Reaction notes

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