Cesium carbonate → (S)-tert-butyl 2-((7-(4-(piperazin-1-yl)phenyl)pyrido[4,3-b]pyrazin-5-ylamino)methyl)morpholine-4-carboxylate

HRID 57630Notes

Reaction equation

HRID 57630 reaction equation
Cl[C:2]1[N:11]=[C:10]([NH:12][CH2:13][C@@H:14]2[O:19][CH2:18][CH2:17][N:16]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:15]2)[C:9]2[C:4](=[N:5][CH:6]=[CH:7][N:8]=2)[CH:3]=1.Cl.CC1(C)C(C)(C)OB([C:36]2[CH:41]=[CH:40][C:39]([N:42]3[CH2:47][CH2:46][NH:45][CH2:44][CH2:43]3)=[CH:38][CH:37]=2)O1.C([O-])([O-])=O.[Cs+].[Cs+]>O1CCOCC1.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[N:42]1([C:39]2[CH:40]=[CH:41][C:36]([C:2]3[N:11]=[C:10]([NH:12][CH2:13][C@@H:14]4[O:19][CH2:18][CH2:17][N:16]([C:20]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:21])[CH2:15]4)[C:9]4[C:4](=[N:5][CH:6]=[CH:7][N:8]=4)[CH:3]=3)=[CH:37][CH:38]=2)[CH2:47][CH2:46][NH:45][CH2:44][CH2:43]1

Participants

7

Reactant 3

HCID 10796Cesium carbonateHCID 710936951-(4-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)piperazine hydrochlorideHCID 86717392(S)-tert-butyl 2-((7-chloropyrido[4,3-b]pyrazin-5-ylamino)methyl)morpholine-4-carboxylate

Product 1

HCID 86717391(S)-tert-butyl 2-((7-(4-(piperazin-1-yl)phenyl)pyrido[4,3-b]pyrazin-5-ylamino)methyl)morpholine-4-carboxylateYield 90%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Procedure

A solution of (S)-tert-butyl 2-((7-chloropyrido[4,3-b]pyrazin-5-ylamino)methyl)morpholine-4-carboxylate (3.96 g, 10.43 mmol), 1-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)piperazine hydrochloride (4.4 g, 13.55 mmol), Pd(PPh3)4 (2.41 g, 2.09 mmol) and Cs2CO3 (10.19 g, 31.29 mmol) in 150 mL of dioxane and 3 mL of water, under N2, was stirred at 110° C. overnight. The volatiles were removed in vacuo, and the residues was purified by chromatography with MeOH/H2O (1:20-5:1) to give 4.747 g of title compound. MS (m/z)=506 (M+H)+.

Workup

  1. customThe volatiles were removed in vacuo
  2. customthe residues was purified by chromatography with MeOH/H2O (1:20-5:1)

Sources & evidence

ORD record
ord-081c9ced9f674afcbfd259f145bcd809
Source dataset
uspto-grants-2016_09
Patent number
US09434726B2

Reaction notes

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