3-(Bromomethyl)-1H-indazole, N1-BOC protected → tert-butyl 3-({1-[2-(benzyloxy)-2-oxoethyl]-2,4-dioxo-5-phenyl-2,3,4,5-tetrahydro-1H-1,5-benzodiazepin-3-yl}methyl)-1H-indazole-1-carboxylate

HRID 1375357Notes

Reaction equation

HRID 1375357 reaction equation
[O:1]=[C:2]1[N:8]([CH2:9][C:10]([O:12][CH2:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)=[O:11])[C:7]2[CH:20]=[CH:21][CH:22]=[CH:23][C:6]=2[N:5]([C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)[C:4](=[O:30])[CH2:3]1.Br[CH2:32][C:33]1[C:41]2[C:36](=[CH:37][CH:38]=[CH:39][CH:40]=2)[N:35]([C:42]([O:44][C:45]([CH3:48])([CH3:47])[CH3:46])=[O:43])[N:34]=1>CN(C=O)C.C1(C)C=CC=CC=1>[CH2:13]([O:12][C:10](=[O:11])[CH2:9][N:8]1[C:7]2[CH:20]=[CH:21][CH:22]=[CH:23][C:6]=2[N:5]([C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)[C:4](=[O:30])[CH:3]([CH2:32][C:33]2[C:41]3[C:36](=[CH:37][CH:38]=[CH:39][CH:40]=3)[N:35]([C:42]([O:44][C:45]([CH3:48])([CH3:47])[CH3:46])=[O:43])[N:34]=2)[C:2]1=[O:1])[C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=1

Participants

5

Reactant 2

HCID 108049513-(Bromomethyl)-1H-indazole, N1-BOC protectedHCID 86602390benzyl (2,4-dioxo-5-phenyl-2,3,4,5-tetrahydro-1H-1,5-benzodiazepin-1-yl)acetate

Product 1

HCID 69426247tert-butyl 3-({1-[2-(benzyloxy)-2-oxoethyl]-2,4-dioxo-5-phenyl-2,3,4,5-tetrahydro-1H-1,5-benzodiazepin-3-yl}methyl)-1H-indazole-1-carboxylate

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 6228DimethylformamideSolvent2×

Procedure

To a stirring solution of benzyl (2,4-dioxo-5-phenyl-2,3,4,5-tetrahydro-1H-1,5-benzodiazepin-1-yl)acetate (3.45 g, 8.62 mM) in 25 mL DMF at 0° C. was added 1.1 equiv. of 0.5 M solution of KN(TMS)2 in toluene. The resulting solution was stirred 10–30 min, then a solution of tert-butyl 3-(bromomethyl)-1H-indazole-1-carboxylate (2.95 g, 9.48 mM) in 15 mL DMF was added. The resulting solution was stirred 2 h at RT and then quenched with 5 mL of H2O. The reaction mixture was then poured into 50 mL of EtOAc and extracted with H2O (2×50 mL). The organic layer was separated, dried (MgSO4), and the solvents removed in vacuo. The resultant material was purified by silica gel flash column chromatography using methylene chloride/EtOAc 9/1 providing 4.4 g of white solid.

Workup

  1. stirringThe resulting solution was stirred 2 h at RT
  2. customquenched with 5 mL of H2O
  3. additionThe reaction mixture was then poured into 50 mL of EtOAc
  4. extractionextracted with H2O (2×50 mL)
  5. customThe organic layer was separated
  6. dry with materialdried (MgSO4)
  7. customthe solvents removed in vacuo
  8. customThe resultant material was purified by silica gel flash column chromatography

Sources & evidence

ORD record
ord-b26e42d70eea42e5865160cccb26cdde
Source dataset
uspto-grants-2007_01
Patent number
US07169773B2

Reaction notes

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