Sodium Thiosulfate → benzhydryl (6R,7R)-3-(chloromethyl)-7-[[(2Z)-2-[2-methyl-1-[(2-methylpropan-2-yl)oxy]-1-oxopropan-2-yl]oxyimino-2-[2-[(2-methylpropan-2-yl)oxycarbonylamino]-1,3-thiazol-4-yl]acetyl]amino]-5,8-dioxo-5lambda4-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

HRID 525866Notes

Reaction equation

HRID 525866 reaction equation
[C:1]([O:5][C:6](=[O:56])[C:7]([O:10]/[N:11]=[C:12](/[C:43]1[N:44]=[C:45]([NH:48][C:49]([O:51][C:52]([CH3:55])([CH3:54])[CH3:53])=[O:50])[S:46][CH:47]=1)\[C:13]([NH:15][C@@H:16]1[C:23](=[O:24])[N:22]2[C@@H:17]1[S:18][CH2:19][C:20]([CH2:41][Cl:42])=[C:21]2[C:25]([O:27][CH:28]([C:35]1[CH:40]=[CH:39][CH:38]=[CH:37][CH:36]=1)[C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1)=[O:26])=[O:14])([CH3:9])[CH3:8])([CH3:4])([CH3:3])[CH3:2].ClC1C=C(C=CC=1)C(OO)=[O:62].S([O-])([O-])(=O)=S.[Na+].[Na+]>ClCCl>[C:1]([O:5][C:6](=[O:56])[C:7]([O:10]/[N:11]=[C:12](/[C:43]1[N:44]=[C:45]([NH:48][C:49]([O:51][C:52]([CH3:55])([CH3:54])[CH3:53])=[O:50])[S:46][CH:47]=1)\[C:13]([NH:15][C@@H:16]1[C:23](=[O:24])[N:22]2[C@@H:17]1[S:18](=[O:62])[CH2:19][C:20]([CH2:41][Cl:42])=[C:21]2[C:25]([O:27][CH:28]([C:35]1[CH:36]=[CH:37][CH:38]=[CH:39][CH:40]=1)[C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1)=[O:26])=[O:14])([CH3:8])[CH3:9])([CH3:2])([CH3:3])[CH3:4]

Participants

5

Reactant 3

HCID 24477Sodium ThiosulfateHCID 70297m-Chloroperbenzoic acidHCID 90373380benzhydryl (6R,7R)-3-(chloromethyl)-7-[[(2Z)-2-[2-methyl-1-[(2-methylpropan-2-yl)oxy]-1-oxopropan-2-yl]oxyimino-2-[2-[(2-methylpropan-2-yl)oxycarbonylamino]-1,3-thiazol-4-yl]acetyl]amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

Product 1

HCID 89495913benzhydryl (6R,7R)-3-(chloromethyl)-7-[[(2Z)-2-[2-methyl-1-[(2-methylpropan-2-yl)oxy]-1-oxopropan-2-yl]oxyimino-2-[2-[(2-methylpropan-2-yl)oxycarbonylamino]-1,3-thiazol-4-yl]acetyl]amino]-5,8-dioxo-5lambda4-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylateYield 79.9%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent3×

Procedure

To a solution of (6R,7R)-benzhydryl 7-((Z)-2-(((1-(tert-butoxy)-2-methyl-1-oxopropan-2-yl)oxy)imino)-2-(2-((tert-butoxycarbonyl)amino)thiazol-4-yl)acetamido)-3-(chloromethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate (3 g, 3.63 mmol) in dichloromethane (DCM) (100 mL) at −40° C. was added dropwise a solution of 3-chlorobenzoperoxoic acid (0.976 g, 4.36 mmol) in dichloromethane 20 mL) over 1 min. The mixture was stirred at the same temperature over 30 min. LCMS indicated completion of the reaction. Dichloromethane (60 mL) was added and the mixture was treated with 15% aqueous sodium thiosulfate (40 mL). The organic solution was separated and washed with 5% sodium bicarbonate (80 mL), brine (80 mL), dried over sodium sulfate, and concentrated. The residue was purified by ISCO automated silica gel chromatography (120 g column, 0-50% ethyl acetate/hexanes) to afford (6R,7R)-benzhydryl 7-((Z)-2-(((1-(tert-butoxy)-2-methyl-1-oxopropan-2-yl)oxy)imino)-2-(2-((tert-butoxycarbonyl)amino)thiazol-4-yl)acetamido)-3-(chloromethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 5-oxide (2.44 g, 2.90 mmol, 53.2% yield) as a white solid. LCMS: (M+H)+: 842.2.

Workup

  1. customcompletion of the reaction
  2. customThe organic solution was separated
  3. washwashed with 5% sodium bicarbonate (80 mL), brine (80 mL)
  4. dry with materialdried over sodium sulfate
  5. concentrationconcentrated
  6. customThe residue was purified by ISCO automated silica gel chromatography (120 g column, 0-50% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-c58a978883d84ac8b8350857a3fd0439
Source dataset
uspto-grants-2016_05
Patent number
US09340556B2

Reaction notes

Loading…