Triethylamine → Tert-butyl 4-(6-hydroxybenzo[d]thiazole-2-carboxamido)piperidine-1-carboxylate

HRID 539822Notes

Reaction equation

HRID 539822 reaction equation
[OH:1][C:2]1[CH:13]=[CH:12][C:5]2[N:6]=[C:7]([C:9]([OH:11])=O)[S:8][C:4]=2[CH:3]=1.C(N(CC)CC)C.O.ON1C2C=CC=CC=2N=N1.Cl.CN(C)CCCN=C=NCC.[NH2:44][CH:45]1[CH2:50][CH2:49][N:48]([C:51]([O:53][C:54]([CH3:57])([CH3:56])[CH3:55])=[O:52])[CH2:47][CH2:46]1>CN(C)C=O>[OH:1][C:2]1[CH:13]=[CH:12][C:5]2[N:6]=[C:7]([C:9]([NH:44][CH:45]3[CH2:46][CH2:47][N:48]([C:51]([O:53][C:54]([CH3:57])([CH3:56])[CH3:55])=[O:52])[CH2:49][CH2:50]3)=[O:11])[S:8][C:4]=2[CH:3]=1

Participants

7

Reactant 5

HCID 8471TriethylamineHCID 12682914-Amino-1-Boc-piperidineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 27960291-Hydroxybenzotriazole hydrateHCID 154983676-Hydroxy-1,3-benzothiazole-2-carboxylic acid

Product 1

HCID 57951061Tert-butyl 4-(6-hydroxybenzo[d]thiazole-2-carboxamido)piperidine-1-carboxylateYield 62%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a stirred mixture of 6-hydroxybenzo[d]thiazole-2-carboxylic acid (0.20 g, 1 mmol) in anhydrous N,N-dimethylformamide (2 mL) was added triethylamine (0.12 g, 1.2 mmol), 1-hydroxybenzotriazole hydrate (0.16 g, 1.2 mmol), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.23 g, 1.2 mmol), and tert-butyl 4-aminopiperidine-1-carboxylate (0.24 g, 1.2 mmol). The mixture was stirred at room temperature overnight and then concentrated under reduced pressure. The residue obtained was purified by flash chromatography (silica gel, ethyl acetate/hexanes=1/1) to afford tert-butyl 4-(6-hydroxybenzo[d]thiazole-2-carboxamido)piperidine-1-carboxylate as a white solid (0.23 g, 62%). 1H-NMR (CDCl3, 300 MHz): δ 7.90 (m, 1H), 7.38 (m, 1H), 7.28 (m, 2H), 7.11 (m, 1H), 4.12 (m, 3H), 2.95 (m, 2H), 2.04 (m, 2H), 1.58 (m, 2H), 1.48 (s, 9H) ppm; MS (ESI): 379.1 (M+1).

Workup

  1. concentrationconcentrated under reduced pressure
  2. customThe residue obtained
  3. customwas purified by flash chromatography (silica gel, ethyl acetate/hexanes=1/1)

Sources & evidence

ORD record
ord-28ca8fda169544ab98d1e5f3b176fafc
Source dataset
uspto-grants-2014_10
Patent number
US08871770B2

Reaction notes

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