Trimethyl orthoformate → N-((1S,3R,4S)-3-ethyl-4-(6-tosylimidazo[4,5-d]pyrrolo[2,3-b]pyridin-1(6H)-yl)cyclopentyl)cyclopropanesulfonamide

HRID 1969819Notes

Reaction equation

HRID 1969819 reaction equation
[NH2:1][C:2]1[C:3]([NH:21][C@@H:22]2[C@H:26]([CH2:27][CH3:28])[CH2:25][C@H:24]([NH:29][S:30]([CH:33]3[CH2:35][CH2:34]3)(=[O:32])=[O:31])[CH2:23]2)=[C:4]2[CH:10]=[CH:9][N:8]([S:11]([C:14]3[CH:20]=[CH:19][C:17]([CH3:18])=[CH:16][CH:15]=3)(=[O:13])=[O:12])[C:5]2=[N:6][CH:7]=1.[CH:36](OC)(OC)OC.O.C1(C)C=CC(S(O)(=O)=O)=CC=1>CO.CCOC(C)=O>[CH2:27]([C@H:26]1[C@@H:22]([N:21]2[C:3]3=[C:4]4[CH:10]=[CH:9][N:8]([S:11]([C:14]5[CH:15]=[CH:16][C:17]([CH3:18])=[CH:19][CH:20]=5)(=[O:12])=[O:13])[C:5]4=[N:6][CH:7]=[C:2]3[N:1]=[CH:36]2)[CH2:23][C@@H:24]([NH:29][S:30]([CH:33]2[CH2:35][CH2:34]2)(=[O:31])=[O:32])[CH2:25]1)[CH3:28]

Participants

6

Reactant 3

HCID 9005Trimethyl orthoformateHCID 521998p-Toluenesulfonic acid monohydrateHCID 58557853N-((1S,3S,4R)-3-(5-amino-1-tosyl-1H-pyrrolo[2,3-b]pyridin-4-ylamino)-4-ethylcyclopentyl)cyclopropanesulfonamide

Product 1

HCID 67998523N-((1S,3R,4S)-3-ethyl-4-(6-tosylimidazo[4,5-d]pyrrolo[2,3-b]pyridin-1(6H)-yl)cyclopentyl)cyclopropanesulfonamideYield 79.7%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
65 °C

Procedure

A mixture of N-((1S,3S,4R)-3-(5-amino-1-tosyl-1H-pyrrolo[2,3-b]pyridin-4-ylamino)-4-ethylcyclopentyl)cyclopropanesulfonamide (0.160 g, 0.309 mmol), trimethyl orthoformate (3.42 mL, 30.9 mmol) and toluene-4-sulfonic acid hydrate (0.006 g, 0.031 mmol) in MeOH (3.1 mL) was heated at about 65° C. for about 1 h then heated at about 60° C. for about 14 h. The reaction mixture was cooled to ambient temperature and concd under reduced pressure. The residue was dissolved in EtOAc (10 mL) and washed with saturated aqueous NaHCO3 (5 mL), water (5 mL), and brine (5 mL). The organic layer was separated, dried over anhydrous MgSO4, filtered and concd under reduced pressure to give N-((1S,3R,4S)-3-ethyl-4-(6-tosylimidazo[4,5-d]pyrrolo[2,3-b]pyridin-1(6H)-yl)cyclopentyl)cyclopropanesulfonamide as a yellow solid (0.130 g, 76%): LC/MS (Table 1, Method n) Rt=0.76 min; MS m/z 528 (M+H)+.

Workup

  1. temperaturethen heated at about 60° C. for about 14 h
  2. temperatureThe reaction mixture was cooled to ambient temperature
  3. washwashed with saturated aqueous NaHCO3 (5 mL), water (5 mL), and brine (5 mL)
  4. customThe organic layer was separated
  5. dry with materialdried over anhydrous MgSO4
  6. filtrationfiltered

Sources & evidence

ORD record
ord-278a30c2161046cc9cdc55afc0a23418
Source dataset
uspto-grants-2013_04
Patent number
US08426411B2

Reaction notes

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