Piperidine → HCID 14390273, compound

HRID 2073000Notes

Reaction equation

HRID 2073000 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:16]([CH2:17][C:18]([OH:20])=O)[C:11]3=[N:12][CH:13]=[CH:14][CH:15]=[C:10]3[N:9]=2)=[CH:4][CH:3]=1.C(N1C=CN=C1)(N1C=CN=C1)=O.[NH:33]1[CH2:38][CH2:37][CH2:36][CH2:35][CH2:34]1>O1CCCC1>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[N:16]([CH2:17][C:18](=[O:20])[N:33]3[CH2:38][CH2:37][CH2:36][CH2:35][CH2:34]3)[C:11]3=[N:12][CH:13]=[CH:14][CH:15]=[C:10]3[N:9]=2)=[CH:6][CH:7]=1

Participants

5

Reactant 3

HCID 8082PiperidineHCID 682631,1'-CarbonyldiimidazoleHCID 143904574-chlorophenyl-3H-imidazo[4,5-b]pyridine-3-acetic acid

Product 1

HCID 14390273HCID 14390273, compoundYield 59.4%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

Under nitrogen bubbling, a mixture of 2-(4-chlorophenyl)-3H-imidazo[4,5-b]pyridine-3-acetic acid (4.0 g, 0.014 mole) and 1,1'-carbonyldiimidazole (2.27 g, 0.014 mole), in 150 ml of tetrahydrofuran was stirred at room temperature for 3 hours. Then, under nitrogen atmosphere, piperidine (1.31 g, 0.015 mole) was added and the reaction mixture was allowed to stir at room temperature overnight. The tetrahydrofuran was evaporated to give a solid which was triturated with water and dried under high vacuum over the weekend at 50° C. The solid was recrystallized from isopropyl alcohol and refrigerated overnight. The crystalline material was collected by filtration, washed with cold isopropyl alcohol, and dried under high vacuum at 50° C. overnight to give 2.95 g (59%) of title compound, mp 176°-178° C.

Workup

  1. customThe tetrahydrofuran was evaporated
  2. customto give a solid which
  3. customwas triturated with water
  4. customdried under high vacuum over the weekend at 50° C
  5. customThe solid was recrystallized from isopropyl alcohol and refrigerated overnight
  6. filtrationThe crystalline material was collected by filtration
  7. washwashed with cold isopropyl alcohol
  8. customdried under high vacuum at 50° C. overnight

Sources & evidence

ORD record
ord-a3be0dba3cbd4d8c8f42c11d90ccff6b
Source dataset
uspto-grants-1990_04
Patent number
US04914109

Reaction notes

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