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Potassium Acetate → 4-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]5,6-dihydro-2H-pyridine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester

HRID 1498481
Notes
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Reaction equation

HRID 1498481 reaction equation
[CH:1]([N:4]1[C:8]([C:9]2[N:18]=[C:17]3[N:11]([CH2:12][CH2:13][O:14][C:15]4[CH:22]=[C:21](B5OC(C)(C)C(C)(C)O5)[CH:20]=[CH:19][C:16]=43)[CH:10]=2)=[N:7][CH:6]=[N:5]1)([CH3:3])[CH3:2].[CH3:32][O:33][C:34]([CH:36]1[CH:41](OS(C(F)(F)F)(=O)=O)[CH2:40][CH2:39][N:38]([C:50]([O:52][C:53]([CH3:56])([CH3:55])[CH3:54])=[O:51])[CH2:37]1)=[O:35].C([O-])(=O)C.[K+]>C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].C(Cl)Cl.O>[CH3:32][O:33][C:34]([C:36]1[CH2:37][N:38]([C:50]([O:52][C:53]([CH3:56])([CH3:55])[CH3:54])=[O:51])[CH2:39][CH2:40][C:41]=1[C:21]1[CH:20]=[CH:19][C:16]2[C:17]3[N:11]([CH2:12][CH2:13][O:14][C:15]=2[CH:22]=1)[CH:10]=[C:9]([C:8]1[N:4]([CH:1]([CH3:3])[CH3:2])[N:5]=[CH:6][N:7]=1)[N:18]=3)=[O:35]
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 3

HCID 517044Potassium AcetateHCID 582047132-(1-isopropyl-1H-1,2,4-triazol-5-yl)-9-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepineHCID 866523114-Trifluoromethanesulphonyloxy-piperidine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester

Product 1

HCID 582042864-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]5,6-dihydro-2H-pyridine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester
Yield 91.2%

Reagents, catalysts & solvents 3

HCID 44119782Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 962WaterSolventHCID 6344DichloromethaneSolvent2×

Conditions

Temperature
120 °C

Procedure

2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-8-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulene (0.20 g, 0.49 mmol), 4-trifluoromethanesulphonyloxy-piperidine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester (0.29 g, 0.75 mmol), potassium acetate (0.12 g, 1.22 mmol), Pd(dppf)2Cl2.DCM (0.04 g, 0.05 mmol), DME:IMS:water 7:2:1 (5 mL), were sealed in a microwave vial and heated by microwave irradiation at 120° C. for 10 min. The reaction mixture was cooled to RT, water and DCM were added, the organic layer separated, washed with water, dried (Na2SO4), filtered and concentrated in vacuo. The resultant residue was subjected to flash chromatography (SiO2, gradient 0 to 5% methanol in DCM) to give 4-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-8-yl]5,6-dihydro-2H-pyridine-1,3-dicarboxylic acid 1-tert-butyl ester 3-methyl ester (239 mg, 91%). 1H NMR 300 MHz (CDCl3) δ: 8.49 (1 H, d, J=8.30 Hz), 7.87 (1 H, d, J=0.64 Hz), 7.64 (1 H, s), 6.92 (1 H, dd, J=8.31, 1.80 Hz), 6.84 (1 H, d, J=1.77 Hz), 6.00 (1 H, m), 4.49-4.47 (4 H, m), 4.27 (2 H, s), 3.62 (2 H, t, J=5.69 Hz), 3.57 (2 H, s), 2.50 (3 H, s), 1.59 (6 H, d, J=6.63 Hz), 1.51 (9 H, s).

Workup

  1. temperatureThe reaction mixture was cooled to RT
  2. customthe organic layer separated
  3. washwashed with water
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-fd4991dd5bdb42ef9ffe82f70c51dde1
Source dataset
uspto-grants-2015_12
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09198918B2

Reaction notes

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