Acetic Acid → (R)alpha-methyl-3-phenoxy-benzyl(1R,cis)2,2-dimethyl-3-[3-oxo-3-hydroxy-1-propynyl]-cyclopropane-carboxylate

HRID 569534Notes

Reaction equation

HRID 569534 reaction equation
[CH3:1][C:2]1([CH3:33])[C@@H:4]([C:5]#[C:6][C:7](=[O:14])[O:8]CC(Cl)(Cl)Cl)[C@H:3]1[C:15]([O:17][C@H:18]([CH3:32])[C:19]1[CH:24]=[CH:23][CH:22]=[C:21]([O:25][C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=2)[CH:20]=1)=[O:16].C(O)(=O)C.O>C(Cl)Cl.[Zn]>[CH3:1][C:2]1([CH3:33])[C@@H:4]([C:5]#[C:6][C:7](=[O:8])[OH:14])[C@H:3]1[C:15]([O:17][C@H:18]([CH3:32])[C:19]1[CH:24]=[CH:23][CH:22]=[C:21]([O:25][C:26]2[CH:27]=[CH:28][CH:29]=[CH:30][CH:31]=2)[CH:20]=1)=[O:16]

Participants

6

Reactant 3

HCID 176Acetic AcidHCID 962WaterHCID 53655047(R)alpha-methyl-3-phenoxy-benzyl (IR,cis) 2,2-dimethyl-3-[3-oxo-3-(2,2,2-trichloroethoxy)-1-propynyl]-cyclopropane-carboxylate

Product 1

HCID 54097883(R)alpha-methyl-3-phenoxy-benzyl(1R,cis)2,2-dimethyl-3-[3-oxo-3-hydroxy-1-propynyl]-cyclopropane-carboxylateYield 98.8%

Reagents, catalysts & solvents 2

HCID 23994ZincCatalyst2×HCID 6344DichloromethaneSolvent

Procedure

A solution of 4.16 g of the product of Step A in 4 ml of methylene chloride was admixed with 45 ml of acetic acid containing 10% of water and 0.53 g of zinc powder and the mixture was stirred for 30 minutes at room temperature, then another 0.53 g of zinc powder were added 4 times until The reaction was complete and after 3 hours contact, the mixture was filtered. The filtrate was extracted with methylene chloride and the organic phase was washed with water, dried and evaporated to dryness by azeotropic distillation with toluene to obtain 3.05 g of (R)α-methyl-3-phenoxy-benzyl(1R,cis)2,2-dimethyl-3-[3-oxo-3-hydroxy-1-propynyl]-cyclopropane-carboxylate.

Workup

  1. waitwas complete and after 3 hours
  2. filtrationcontact, the mixture was filtered
  3. extractionThe filtrate was extracted with methylene chloride
  4. washthe organic phase was washed with water
  5. customdried
  6. customevaporated to dryness by azeotropic distillation with toluene

Sources & evidence

ORD record
ord-b288640e5bc24d34bc9befb20ce292f4
Source dataset
uspto-grants-1988_03
Patent number
US04732903

Reaction notes

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