Water → Di-tert-butyl (1S,2R,3S,4R,5R,6R)-2-[(tert-butoxycarbonyl)amino]-3-[(3,4-dichlorobenzyl)oxy]-4-hydroxybicyclo[3.1.0]hexane-2,6-dicarboxylate

HRID 2173008Notes

Reaction equation

HRID 2173008 reaction equation
[C:1]([O:5][C:6]([NH:8][C@@:9]1([C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:25])[C@H:14]([OH:15])[C@H:13]([OH:16])[C@@H:12]2[C@H:10]1[C@H:11]2[C:17]([O:19][C:20]([CH3:23])([CH3:22])[CH3:21])=[O:18])=[O:7])([CH3:4])([CH3:3])[CH3:2].[Cl:31][C:32]1[CH:33]=[C:34]([CH:37]=[CH:38][C:39]=1[Cl:40])[CH2:35]Br.[OH-].[Na+].O>ClCCl.CCCC[N+](CCCC)(CCCC)CCCC.[Cl-]>[C:1]([O:5][C:6]([NH:8][C@@:9]1([C:24]([O:26][C:27]([CH3:30])([CH3:29])[CH3:28])=[O:25])[C@H:14]([O:15][CH2:35][C:34]2[CH:37]=[CH:38][C:39]([Cl:40])=[C:32]([Cl:31])[CH:33]=2)[C@H:13]([OH:16])[C@@H:12]2[C@H:10]1[C@H:11]2[C:17]([O:19][C:20]([CH3:21])([CH3:23])[CH3:22])=[O:18])=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

7

Reactant 4

HCID 962WaterHCID 14798Sodium HydroxideHCID 6397264-(Bromomethyl)-1,2-dichlorobenzeneHCID 67704267HCID 67704267, compound

Product 1

HCID 86695972Di-tert-butyl (1S,2R,3S,4R,5R,6R)-2-[(tert-butoxycarbonyl)amino]-3-[(3,4-dichlorobenzyl)oxy]-4-hydroxybicyclo[3.1.0]hexane-2,6-dicarboxylateYield 92%

Reagents, catalysts & solvents 2

HCID 70681Tetrabutylammonium ChlorideCatalystHCID 6344DichloromethaneSolvent

Procedure

To a solution of di-tert-butyl (1S,2R,3S,4R,5R,6R)-2-[(tert-butoxycarbonyl)amino]-3,4-dihydroxybicyclo[3.1.0]hexane-2,6-dicarboxylate (450 g, 1.05 mol) in dichloromethane (4.50 L) at room temperature is sequentially added 3,4-dichlorobenzyl bromide (144.73 mL, 238.80 g, 995.32 mmol), tetra-N-butylammonium chloride (58.24 g, 209.54 mmol), and a 50% wt/wt aqueous solution of sodium hydroxide (829.80 mL, 15.72 mol). After 7 hours, dilute the reaction with water (1 L) and separate the phases. Extract the organic phase with brine (500 mL), dry over anhydrous MgSO4, filter and concentrate. Purify the residue by chromatography (2.5 kg of SiO2; eluent: hexane/ethyl acetate 12:1 to 0:1) to give the title compound (539 g, 72% yield).

Workup

  1. customat room temperature
  2. additiondilute
  3. customseparate the phases
  4. extractionExtract the organic phase with brine (500 mL)
  5. dry with materialdry over anhydrous MgSO4
  6. filtrationfilter
  7. concentrationconcentrate
  8. customPurify the residue by chromatography (2.5 kg of SiO2; eluent: hexane/ethyl acetate 12:1 to 0:1)

Sources & evidence

ORD record
ord-ff4b0ec4f3ba488b984951459685e1a4
Source dataset
uspto-grants-2015_06
Patent number
US09056844B2

Reaction notes

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