Sulfuric Acid → (R)-2-(3,5-dibromo-4-hydroxy-phenyl)-1-methoxycarbonyl-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate

HRID 491177Notes

Reaction equation

HRID 491177 reaction equation
OS(O)(=O)=O.[O:6]=[C:7]1[N:13]([CH:14]2[CH2:19][CH2:18][N:17]([C:20]([O:22][C@@H:23](OC)[C:24](=C=O)[C:25]3[CH:30]=[C:29]([Br:31])[C:28]([O:32]COCC[Si](C)(C)C)=[C:27]([Br:41])[CH:26]=3)=[O:21])[CH2:16][CH2:15]2)[CH2:12][CH2:11][C:10]2[CH:46]=[CH:47][CH:48]=[CH:49][C:9]=2[NH:8]1>C1COCC1.CO>[O:6]=[C:7]1[N:13]([CH:14]2[CH2:15][CH2:16][N:17]([C:20]([O:22][C@@H:23]([C:20]([O:22][CH3:23])=[O:21])[CH2:24][C:25]3[CH:26]=[C:27]([Br:41])[C:28]([OH:32])=[C:29]([Br:31])[CH:30]=3)=[O:21])[CH2:18][CH2:19]2)[CH2:12][CH2:11][C:10]2[CH:46]=[CH:47][CH:48]=[CH:49][C:9]=2[NH:8]1

Participants

5

Reactant 2

HCID 1118Sulfuric AcidHCID 86608969(R)-2-[3,5-dibromo-4-(2-trimethylsilanyl-ethoxymethoxy)-phenyl]-1-methoxy-carbonyl-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate

Product 1

HCID 67302314(R)-2-(3,5-dibromo-4-hydroxy-phenyl)-1-methoxycarbonyl-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

Under a nitrogen atmosphere 5.46 mL methanolic H2SO4 (0.5 M) was added to a solution of 4.30 g (5.69 mmol) (R)-2-[3,5-dibromo-4-(2-trimethylsilanyl-ethoxymethoxy)-phenyl]-1-methoxy-carbonyl-ethyl 4-(2-oxo-1,2,4,5-tetrahydro-1,3-benzodiazepin-3-yl)-piperidine-1-carboxylate in 40 mL THF and 40 mL MeOH and the reaction solution was stirred for 6 h at RT. The reaction mixture was evaporated down i.vac. and the residue was further reacted without purification.

Workup

  1. customThe reaction mixture was evaporated down i.vac
  2. customand the residue was further reacted without purification

Sources & evidence

ORD record
ord-2a820edce1a1436bac00ed19942e5dfc
Source dataset
uspto-grants-2009_05
Patent number
US07528129B2

Reaction notes

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