Tributylphosphine → HCID 57786267, compound

HRID 1628979Notes

Reaction equation

HRID 1628979 reaction equation
[Cl:1][C:2]1[C:10]2[N:9]=[C:8]3[N:11]([C:15]4[CH:20]=[CH:19][C:18]([O:21][CH3:22])=[CH:17][C:16]=4[Cl:23])[CH2:12][CH2:13][CH2:14][N:7]3[C:6]=2[C:5]([CH:24]([CH:26]2[CH2:28][CH2:27]2)[OH:25])=[CH:4][CH:3]=1.N(C(N1CCCCC1)=O)=NC(N1CCCCC1)=O.C(P(CCCC)CCCC)CCC.[F:60][CH:61]([F:64])[CH2:62]O>O1CCCC1>[Cl:1][C:2]1[C:10]2[N:9]=[C:8]3[N:11]([C:15]4[CH:20]=[CH:19][C:18]([O:21][CH3:22])=[CH:17][C:16]=4[Cl:23])[CH2:12][CH2:13][CH2:14][N:7]3[C:6]=2[C:5]([CH:24]([CH:26]2[CH2:28][CH2:27]2)[O:25][CH2:62][CH:61]([F:64])[F:60])=[CH:4][CH:3]=1

Participants

6

Reactant 4

HCID 13831TributylphosphineHCID 730421,1'-(Azodicarbonyl)dipiperidineHCID 1361872,2-Difluoroethan-1-olHCID 57785902HCID 57785902, compound

Product 1

HCID 57786267HCID 57786267, compoundYield 59.6%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of [9-chloro-1-(2-chloro-4-methoxyphenyl)-1,2,3,4-tetrahydropyrimido[1,2-a]benzimidazol-6-yl](cyclopropyl)methanol (120 mg, 0.26 mmol), 1,1′-(azodicarbonyl)dipiperdine (131 mg, 0.52 mmol) in tetrahydrofuran (5.0 mL) was added tri(n-butyl)phosphine (0.130 mL, 0.52 mmol) at room temperature. After the mixture was stirred at room temperature for 10 min under nitrogen atmosphere, 2,2-difluoroethanol (0.165 mL, 2.61 mmol) was added to the reaction mixture. The mixture was stirred at 50° C. for 16 hr under nitrogen atmosphere. The mixture was concentrated in vacuo and diethyl ether was added to the residue. The solid was removed by filtration and the filtrate was concentrated in vacuo. The residue was purified by flash chromatography on silica gel eluting with a 10-50% ethyl acetate/n-hexane gradient mixture and recrystallization from ethyl acetate/n-hexane to give the title compound (72.8 mg, 0.155 mmol, 58%) as colorless crystals.

Workup

  1. stirringThe mixture was stirred at 50° C. for 16 hr under nitrogen atmosphere
  2. concentrationThe mixture was concentrated in vacuo and diethyl ether
  3. additionwas added to the residue
  4. customThe solid was removed by filtration
  5. concentrationthe filtrate was concentrated in vacuo
  6. customThe residue was purified by flash chromatography on silica gel eluting with a 10-50% ethyl acetate/n-hexane gradient mixture and recrystallization from ethyl acetate/n-hexane

Sources & evidence

ORD record
ord-bb44b34f06574304b345b757aab968a0
Source dataset
uspto-grants-2014_07
Patent number
US08785460B2

Reaction notes

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