1,2-Dimethoxyethane → 4-(3-Cyano-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazol-8-yl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester

HRID 2202434Notes

Reaction equation

HRID 2202434 reaction equation
[C:1]([C:3]1[CH:15]=[C:14]2[C:6]([C:7]3[C:8](=[O:30])[C:9]4[CH:21]=[CH:20][C:19](OS(C(F)(F)F)(=O)=O)=[CH:18][C:10]=4[C:11]([CH3:17])([CH3:16])[C:12]=3[NH:13]2)=[CH:5][CH:4]=1)#[N:2].[C:31]([O:35][C:36]([N:38]1[CH2:43][CH:42]=[C:41](B2OC(C)(C)C(C)(C)O2)[CH2:40][CH2:39]1)=[O:37])([CH3:34])([CH3:33])[CH3:32].C(=O)([O-])[O-].[Na+].[Na+].COCCOC>Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.O>[C:31]([O:35][C:36]([N:38]1[CH2:39][CH:40]=[C:41]([C:19]2[CH:20]=[CH:21][C:9]3[C:8](=[O:30])[C:7]4[C:6]5[C:14](=[CH:15][C:3]([C:1]#[N:2])=[CH:4][CH:5]=5)[NH:13][C:12]=4[C:11]([CH3:17])([CH3:16])[C:10]=3[CH:18]=2)[CH2:42][CH2:43]1)=[O:37])([CH3:34])([CH3:32])[CH3:33]

Participants

7

Reactant 4

HCID 80711,2-DimethoxyethaneHCID 10340Sodium CarbonateHCID 4642098Tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,6-tetrahydropyridine-1-carboxylateHCID 86663817Trifluoro-methanesulfonic acid 3-cyano-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazol-8-yl ester2×

Product 1

HCID 668338144-(3-Cyano-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazol-8-yl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl esterYield 90%

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 962WaterSolvent

Conditions

Temperature
80 °C

Procedure

To trifluoro-methane sulfonic acid 3-cyano-6,6-dimethyl-11-oxo-6,11-dihydro-5H-benzo[b]carbazol-8-yl ester (Compound B1, 7.80 g, 18.0 mmol), 4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-3,6-dihydro-2H-pyridine-1-carboxylic acid tert-butyl ester (6.11 g, 19.8 mmol, 1.1 eq.), Pd(PPh3)2Cl2 (630 mg, 0.898 mmol, 0.05 eq.), and sodium carbonate (5.71 g, 53.9 mmol, 3.0 eq.), DME (125 ml) and water (25 ml) were added. The mixture was subjected to reduced pressure under ultrasonication treatment, followed by filling with nitrogen. This procedure was repeated five times to remove air. After further stirring at 80° C. for 2 hours under nitrogen atmosphere, the mixture was cooled to room temperature, added with water (250 ml), and further stirred for 30 minutes. The precipitates were filtered and washed with water (50 ml). They were further washed with CH3CN (50 ml) to obtain the target compound as a crude product (gray powder, 7.54 g, 90%).

Workup

  1. customThe mixture was subjected to reduced pressure under ultrasonication treatment
  2. customto remove air
  3. temperaturethe mixture was cooled to room temperature
  4. additionadded with water (250 ml)
  5. stirringfurther stirred for 30 minutes
  6. filtrationThe precipitates were filtered
  7. washwashed with water (50 ml)
  8. washThey were further washed with CH3CN (50 ml)

Sources & evidence

ORD record
ord-ed8f514568dd46b09c2e81531d8ac190
Source dataset
uspto-grants-2016_06
Patent number
US09365514B2

Reaction notes

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