Ethyl bromoacetate → HCID 54335969, compound
Reaction equation
[S:1]1[CH:5]=[CH:4][CH:3]=[C:2]1[C:6](=[O:15])[CH2:7][C:8]([C:10]1[S:11][CH:12]=[CH:13][CH:14]=1)=[O:9].[CH2:16]([O:18][C:19](=[O:22])[CH2:20]Br)[CH3:17]>>[CH2:16]([O:18][C:19](=[O:22])[CH2:20][CH:7]([C:8]([C:10]1[S:11][CH:12]=[CH:13][CH:14]=1)=[O:9])[C:6]([C:2]1[S:1][CH:5]=[CH:4][CH:3]=1)=[O:15])[CH3:17]Participants
3
Procedure
Following a procedure analogous to that described in Example (2b), 1,3-di-(2-thienyl)-1,3-propanedione was alkylated by reaction with bromoacetic acid ethyl ester to form 3,3-di-(2-thienoyl)-propionic acid ethyl ester, which was reacted with phenylhydrazine in accordance with a procedure analogous to that set out in Example (2c) to form 1-phenyl-3,5-di-(2-thienyl)-pyrazol-4-acetic acid ethyl ester. This substance was saponified by a procedure analogous to that described in Example (1b). 1-Phenyl-3,5-di-(2-thienyl)-pyrazol-4-acetic acid, melting at 216°-218° C., was obtained in a yield of 56% based on the propanedione starting material.
Sources & evidence
- ORD record
- ord-fb1bdd2b3c424a958920fbdcdd9284a6
- Source dataset
- uspto-grants-1982_04
- Patent number
- US04325962
Reaction notes
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