Potassium Phosphate, Tribasic → tert-butyl {1-methyl-1-[4-(2-phenyl-9H-imidazo[1,2-d]pyrido[2,3-b][1,4]benzodiazepin-3-yl) phenyl]ethyl}carbamate

HRID 1047034Notes

Reaction equation

HRID 1047034 reaction equation
Br[C:2]1[N:6]2[C:7]3[CH:19]=[CH:18][CH:17]=[N:16][C:8]=3[NH:9][C:10]3[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=3[C:5]2=[N:4][C:3]=1[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1.[CH3:26][C:27]([NH:44][C:45](=[O:51])[O:46][C:47]([CH3:50])([CH3:49])[CH3:48])([C:29]1[CH:34]=[CH:33][C:32](B2OC(C)(C)C(C)(C)O2)=[CH:31][CH:30]=1)[CH3:28].P([O-])([O-])([O-])=O.[K+].[K+].[K+]>O1CCOCC1.O>[CH3:28][C:27]([NH:44][C:45](=[O:51])[O:46][C:47]([CH3:48])([CH3:49])[CH3:50])([C:29]1[CH:30]=[CH:31][C:32]([C:2]2[N:6]3[C:7]4[CH:19]=[CH:18][CH:17]=[N:16][C:8]=4[NH:9][C:10]4[CH:15]=[CH:14][CH:13]=[CH:12][C:11]=4[C:5]3=[N:4][C:3]=2[C:20]2[CH:21]=[CH:22][CH:23]=[CH:24][CH:25]=2)=[CH:33][CH:34]=1)[CH3:26]

Participants

6

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 231344434-[2-(Boc-amino)-2-propyl]phenylboronic Acid Pinacol EsterHCID 675030133-bromo-2-phenyl-9H-imidazo[1,2-d]pyrido[2,3-b][1,4]benzodiazepine

Product 1

HCID 69087668tert-butyl {1-methyl-1-[4-(2-phenyl-9H-imidazo[1,2-d]pyrido[2,3-b][1,4]benzodiazepin-3-yl) phenyl]ethyl}carbamateYield 80.2%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
80 °C

Procedure

A suspension of 3-bromo-2-phenyl-9H-imidazo[1,2-d]pyrido[2,3-b][1,4]benzodiazepine (50 mg) and tert-butyl {1-methyl-1-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]ethyl}carbamate (93 mg) and potassium phosphate (82 mg) and PdCl2(dppf)CH2Cl2 (11 mg) in dioxane (2.5 mL) and H2O (0.25 mL) was degassed for 5 min then stirred at 80° C. for 18 h. The reaction mixture was concentrated under reduced pressure. Purification by column chromatography (0-50% ethyl acetate in hexanes) gave the product (56 mg, 80%). 1HNMR (DMSO-d6) 400 MHz δ: 8.54 (s, 1H), 8.09-8.00 (m, 1H), 7.95 (dd, 1H, J=7.8, 1.4 Hz), 7.55-7.48 (m, 2H), 7.38-7.32 (m, 3H), 7.31-7.19 (m, 5H), 7.17-7.07 (m, 3H), 6.91-6.77 (m, 1H), 6.70-6.59 (m, 1H), 1.50 (br s, 6H), 1.41-1.05 (m, 9H). LCMS: 544 [M+H].

Workup

  1. customwas degassed for 5 min
  2. concentrationThe reaction mixture was concentrated under reduced pressure
  3. customPurification by column chromatography (0-50% ethyl acetate in hexanes)

Sources & evidence

ORD record
ord-2bb4631325cf430295d8fbdd0fd0ee05
Source dataset
uspto-grants-2013_10
Patent number
US08569331B2

Reaction notes

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