N-methyl-2-pyrrolidone → 2,4,8,10-Tetra-tert-butyl-6-chloro-12-methyl-12H-dibenzo[d,g][1,3,2]dioxaphosphocine

HRID 342392

Reaction equation

HRID 342392 reaction equation
[CH:1]([C:18]1[CH:23]=[C:22]([C:24]([CH3:27])([CH3:26])[CH3:25])[CH:21]=[C:20]([C:28]([CH3:31])([CH3:30])[CH3:29])[C:19]=1[OH:32])([C:3]1[CH:8]=[C:7]([C:9]([CH3:12])([CH3:11])[CH3:10])[CH:6]=[C:5]([C:13]([CH3:16])([CH3:15])[CH3:14])[C:4]=1[OH:17])[CH3:2].CN1CCCC1=O.[P:40](Cl)(Cl)[Cl:41]>C1(C)C=CC=CC=1>[Cl:41][P:40]1[O:17][C:4]2[C:5]([C:13]([CH3:16])([CH3:14])[CH3:15])=[CH:6][C:7]([C:9]([CH3:12])([CH3:10])[CH3:11])=[CH:8][C:3]=2[CH:1]([CH3:2])[C:18]2[CH:23]=[C:22]([C:24]([CH3:27])([CH3:26])[CH3:25])[CH:21]=[C:20]([C:28]([CH3:31])([CH3:30])[CH3:29])[C:19]=2[O:32]1

Participants

5

Reactant 3

HCID 13387N-methyl-2-pyrrolidoneHCID 24387Phosphorus trichlorideHCID 1188992,2'-Ethylidenebis(4,6-di-tert-butylphenol)

Product 1

HCID 110602032,4,8,10-Tetra-tert-butyl-6-chloro-12-methyl-12H-dibenzo[d,g][1,3,2]dioxaphosphocineYield 34.8%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

To a solution of 50.9 g. (0.12 mol) of 2,2'-ethylidenebis(4,6-di-tert-butylphenol) and 1.73 mL (0.018 mol) of 1-methyl-2-pyrrolidinone in 275 mL of toluene at ambient temperature is added dropwise 15.7 mL (0.18 mol) of phosphorus trichloride. After the addition is complete, the reaction mixture is heated at reflux for 18 hours. After cooling to room temperature, the toluene is removed in vacuo and the residue is then recrystallized twice from 250 mL of acetonitrile. The acetonitrile is decanted from the product which is dried under vacuum to give 21.0 g (34.8% yield) of the title compound as an off-white solid melting at 194°-198° C.

Workup

  1. additionAfter the addition
  2. temperaturethe reaction mixture is heated
  3. temperatureat reflux for 18 hours
  4. customthe toluene is removed in vacuo
  5. customthe residue is then recrystallized twice from 250 mL of acetonitrile
  6. customThe acetonitrile is decanted from the product which
  7. customis dried under vacuum

Sources & evidence

ORD record
ord-2e8ce357f8ef4ede897ab18ce36432da
Source dataset
uspto-grants-1999_01
Patent number
US05858905

Linked notes

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