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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 61752
Notes
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Reaction equation

HRID 61752 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]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

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 66833814
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
Yield 90%

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 962WaterSolvent

Conditions

Temperature
80 °C

Procedure

To trifluoro-methanesulfonic 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 flushing with nitrogen gas. This procedure was repeated five times and then degassed. After further stirring at 80° C. for 2 hr under nitrogen atmosphere, the mixture was cooled to room temperature, added with water (250 ml), and further stirred for 30 min. 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. customby flushing with nitrogen gas
  3. customdegassed
  4. temperaturethe mixture was cooled to room temperature
  5. additionadded with water (250 ml)
  6. stirringfurther stirred for 30 min
  7. filtrationThe precipitates were filtered
  8. washwashed with water (50 ml)
  9. washThey were further washed with CH3CN (50 ml)

Sources & evidence

ORD record
ord-b9d0a98fe4834385af7afb06cd46afe8
Source dataset
uspto-grants-2016_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09440922B2

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes