Cesium carbonate → 3-{2-[2-((R)-1-Hydroxyethyl)benzoimidazol-1-yl]-9-methyl-6-morpholin-4-yl-9H-purin-8-ylmethylene}azetidine-1-carboxylic acid tert-butyl ester

HRID 1945684Notes

Reaction equation

HRID 1945684 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:11][C:10](=[CH:12][C:13]2[N:14]([CH3:29])[C:15]3[C:20]([N:21]=2)=[C:19]([N:22]2[CH2:27][CH2:26][O:25][CH2:24][CH2:23]2)[N:18]=[C:17](Cl)[N:16]=3)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[NH:30]1[C:34]2[CH:35]=[CH:36][CH:37]=[CH:38][C:33]=2[N:32]=[C:31]1[C@H:39]([OH:41])[CH3:40].CC(C1C=C(C(C)C)C(C2C=CC=CC=2P(C2CCCCC2)C2CCCCC2)=C(C(C)C)C=1)C.C([O-])([O-])=O.[Cs+].[Cs+]>C1(C)C=CC=CC=1.[Pd].[Pd].C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1>[C:1]([O:5][C:6]([N:8]1[CH2:11][C:10](=[CH:12][C:13]2[N:14]([CH3:29])[C:15]3[C:20]([N:21]=2)=[C:19]([N:22]2[CH2:27][CH2:26][O:25][CH2:24][CH2:23]2)[N:18]=[C:17]([N:30]2[C:34]4[CH:35]=[CH:36][CH:37]=[CH:38][C:33]=4[N:32]=[C:31]2[C@H:39]([OH:41])[CH3:40])[N:16]=3)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 10796Cesium carbonateHCID 729393(1R)-1-(1H-1,3-benzodiazol-2-yl)ethan-1-olHCID 111557942-Dicyclohexylphosphino-2',4',6'-triisoprophylbiphenylHCID 59605709tert-butyl 3-((2-chloro-9-methyl-6-morpholino-9H-purin-8-yl)methylene)azetidine-1-carboxylate

Product 1

HCID 596059333-{2-[2-((R)-1-Hydroxyethyl)benzoimidazol-1-yl]-9-methyl-6-morpholin-4-yl-9H-purin-8-ylmethylene}azetidine-1-carboxylic acid tert-butyl esterYield 72%

Reagents, catalysts & solvents 2

HCID 9832798Tris(dibenzylideneacetone) dipalladiumCatalystHCID 1140TolueneSolvent

Conditions

Temperature
140 °C

Procedure

A mixture of 3-(2-chloro-9-methyl-6-morpholin-4-yl-9H-purin-8-ylmethylene)azetidine-1-carboxylic acid tert-butyl ester (180 mg, 0.43 mmol), (R)-1-(1H-benzoimidazol-2-yl)ethanol (84 mg, 0.52 mmol), tris(dibenzylideneacetone) dipalladium (40 mg, 0.04 mmol), XPhos (82 mg, 0.17 mmol) and Cs2CO3 (279 mg, 0.86 mmol) in toluene (3 mL) was purged with argon then heated at 140° C. for 1 h in a microwave reactor. The reaction mixture was filtered through Celite®, washing with EtOAc and the filtrate concentrated in vacuo. The resulting residue was purified by column chromatography (Si—PCC, MeOH:EtOAc, 0-15%) affording the title compound (167 mg, 72%). LCMS (method A): RT 3.24 min [M+H]+ 547.4

Workup

  1. customwas purged with argon
  2. filtrationThe reaction mixture was filtered through Celite®
  3. washwashing with EtOAc
  4. concentrationthe filtrate concentrated in vacuo
  5. customThe resulting residue was purified by column chromatography (Si—PCC, MeOH:EtOAc, 0-15%)

Sources & evidence

ORD record
ord-e3798c0c2f2a4ffd90c409e58899439f
Source dataset
uspto-grants-2013_03
Patent number
US08394796B2

Reaction notes

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