Potassium Carbonate → tert-butyl 7-(tert-butoxycarbonyl(methyl)amino)-5-(3-(ethylsulfonyl)phenyl)-8-methoxy-3-methyl-9H-pyrido[2,3-b]indole-9-carboxylate

HRID 1642591Notes

Reaction equation

Br[C:2]1[CH:10]=[C:9]([N:11]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])[CH3:12])[C:8]([O:20][CH3:21])=[C:7]2[C:3]=1[C:4]1[CH:32]=[C:31]([CH3:33])[CH:30]=[N:29][C:5]=1[N:6]2[C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23].[CH2:34]([S:36]([C:39]1[CH:40]=[C:41](B(O)O)[CH:42]=[CH:43][CH:44]=1)(=[O:38])=[O:37])[CH3:35].O1CCOCC1.C([O-])([O-])=O.[K+].[K+]>CCOC(C)=O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:16]([O:15][C:13]([N:11]([CH3:12])[C:9]1[C:8]([O:20][CH3:21])=[C:7]2[C:3]([C:4]3[CH:32]=[C:31]([CH3:33])[CH:30]=[N:29][C:5]=3[N:6]2[C:22]([O:24][C:25]([CH3:28])([CH3:26])[CH3:27])=[O:23])=[C:2]([C:41]2[CH:42]=[CH:43][CH:44]=[C:39]([S:36]([CH2:34][CH3:35])(=[O:37])=[O:38])[CH:40]=2)[CH:10]=1)=[O:14])([CH3:18])([CH3:19])[CH3:17]

Participants

Conditions

Temperature: 140 °C

Procedure

A 5 mL microwave vial was charged with Compound 250 (520 mg, 1.0 mmol), 3-(ethylsulfonyl)phenylboronic acid (321 mg, 1.5 mmol) and Pd(PPh3)4 (116 mg, 0.10 mmol). To the mixture was added dioxane (2 mL) and a saturated aqueous solution of K2CO3 (1 mL). The reaction mixture was heated at 140° C. for 20 min. in microwave. The reaction was diluted with EtOAc and washed with water and brine. The organic extracts were dried (Na2SO4) and concentrated and the crude Compound 251 was taken forward for Boc deprotection.

Workup

washwashed with water and brine
dry with materialThe organic extracts were dried (Na2SO4)
concentrationconcentrated

Sources & evidence

ORD record: ord-75546dda69044c439656d949fdb244aa
Source dataset: uspto-grants-2012_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08119655B2

Reaction notes

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