Carbofuran → HCID 13591799, compound
Reaction equation
[CH3:1][NH:2][C:3](=[O:16])[O:4][C:5]1[C:13]2[O:12][C:11]([CH3:15])([CH3:14])[CH2:10][C:9]=2[CH:8]=[CH:7][CH:6]=1.[Cl:17]Cl>C(Cl)(Cl)Cl.C(Cl)(Cl)(Cl)Cl>[CH3:1][NH:2][C:3](=[O:16])[O:4][C:5]1[C:13]2[O:12][C:11]([CH3:14])([CH3:15])[CH2:10][C:9]=2[CH:8]=[C:7]([Cl:17])[CH:6]=1Participants
Reactant 2
Product 1
Reagents, catalysts & solvents 2
Procedure
To a solution of 2,3-dihydro-2,2-dimethyl-7-benzofuranyl methylcarbamate (33.2 g, 0.15 mol) in 150 ml of chloroform and 300 ml of carbon tetrachloride, chlorine (10.7 g, 0.15 mol) was gradually fed at a temperature of from 10° to 15° C. under stirring. The precipitated crystals were collected by filtration and washed with hexane, whereby 34.1 g of 5-chloro-2,3-dihydro-2,2-dimethyl-7-benzofuranyl methylcarbamate was obtained. The melting of this product was 167°-169° C. The structure was confirmed by 1H-NMR spectrum. Then, the product was added to 100 ml of a 10% aqueous sodium hydroxide-methanol solution and heated at 80° C. for 3 hours. The reaction solution was neutralized with hydrochloric acid and extracted with ether. The ether layer was washed with water, dried over anhydrous sodium sulfate and concentrated, whereby 23.0 g of 5-chloro-2,3-dihydro-2,2-dimethyl-7-benzofuranol was obtained. The melting point of this product was 65.5°-66.5° C. The phenol thus obtained, was reacted with O-ethyl-S-n-propyldithiophosphoryl chloride in the same manner as in Example 1, whereby the compound (No. 18) identified in Table 1 was obtained.
Workup
- customwas gradually fed at a temperature of from 10° to 15° C.
- filtrationThe precipitated crystals were collected by filtration
- washwashed with hexane
Sources & evidence
- ORD record
- ord-ae0a89e492b94d10a3430599b799976b
- Source dataset
- uspto-grants-1985_12
- Patent number
- US04560682
Reaction notes
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