2,8-dimethylnonane-4,6-dione

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 10 grams diisovalerylmethane (as described by Swamer and Hauser), were reacted with 1.3 gram of a 50% suspension of sodium hydride in paraffin oil and 10 grams bromoacetic acid-ethylester by a procedure analogous to that described in Example (2b). The benzene solution obtained in this procedure was evaporated and the residue of crude 3,3-diisovalerylpropionic acid-ethyl ester obtained thereby was mixed with 6.5 grams phenylhydrazine and 4 grams glacial acetic acid and the mixture was heated to the boiling temperature under reflux for 2 hours. The reaction mixture obtained thereby was then worked up in accordance with a procedure analogous to that described in Example (1a). The ester thus recovered was saponified and the free acid recovered by a procedure analogous to that described in Example (1b). 7.5 grams 3,5-diisobutyl-1-phenyl-pyrazol-4-acetic acid, melting at 125°-126° C., were obtained representing a yield of 44% on the diisovalerylmethane starting material. was evaporated the residue of crude 3,3-diisovalerylpropionic acid-ethyl ester obtained the mixture was heated to the boiling temperature under reflux for 2 hours The reaction mixture obtained The ester thus recovered the free acid recovered by a procedure analogous to

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 10 grams diisovalerylmethane (as described by Swamer and Hauser), were reacted with 1.3 gram of a 50% suspension of sodium hydride in paraffin oil and 10 grams bromoacetic acid-ethylester by a procedure analogous to that described in Example (2b). The benzene solution obtained in this procedure was evaporated and the residue of crude 3,3-diisovalerylpropionic acid-ethyl ester obtained thereby was mixed with 6.5 grams phenylhydrazine and 4 grams glacial acetic acid and the mixture was heated to the boiling temperature under reflux for 2 hours. The reaction mixture obtained thereby was then worked up in accordance with a procedure analogous to that described in Example (1a). The ester thus recovered was saponified and the free acid recovered by a procedure analogous to that described in Example (1b). 7.5 grams 3,5-diisobutyl-1-phenyl-pyrazol-4-acetic acid, melting at 125°-126° C., were obtained representing a yield of 44% on the diisovalerylmethane starting material. was evaporated the residue of crude 3,3-diisovalerylpropionic acid-ethyl ester obtained the mixture was heated to the boiling temperature under reflux for 2 hours The reaction mixture obtained The ester thus recovered the free acid recovered by a procedure analogous to

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 10 grams diisovalerylmethane (as described by Swamer and Hauser), were reacted with 1.3 gram of a 50% suspension of sodium hydride in paraffin oil and 10 grams bromoacetic acid-ethylester by a procedure analogous to that described in Example (2b). The benzene solution obtained in this procedure was evaporated and the residue of crude 3,3-diisovalerylpropionic acid-ethyl ester obtained thereby was mixed with 6.5 grams phenylhydrazine and 4 grams glacial acetic acid and the mixture was heated to the boiling temperature under reflux for 2 hours. The reaction mixture obtained thereby was then worked up in accordance with a procedure analogous to that described in Example (1a). The ester thus recovered was saponified and the free acid recovered by a procedure analogous to that described in Example (1b). 7.5 grams 3,5-diisobutyl-1-phenyl-pyrazol-4-acetic acid, melting at 125°-126° C., were obtained representing a yield of 44% on the diisovalerylmethane starting material. was evaporated the residue of crude 3,3-diisovalerylpropionic acid-ethyl ester obtained the mixture was heated to the boiling temperature under reflux for 2 hours The reaction mixture obtained The ester thus recovered the free acid recovered by a procedure analogous to

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 10 grams diisovalerylmethane (as described by Swamer and Hauser), were reacted with 1.3 gram of a 50% suspension of sodium hydride in paraffin oil and 10 grams bromoacetic acid-ethylester by a procedure analogous to that described in Example (2b). The benzene solution obtained in this procedure was evaporated and the residue of crude 3,3-diisovalerylpropionic acid-ethyl ester obtained thereby was mixed with 6.5 grams phenylhydrazine and 4 grams glacial acetic acid and the mixture was heated to the boiling temperature under reflux for 2 hours. The reaction mixture obtained thereby was then worked up in accordance with a procedure analogous to that described in Example (1a). The ester thus recovered was saponified and the free acid recovered by a procedure analogous to that described in Example (1b). 7.5 grams 3,5-diisobutyl-1-phenyl-pyrazol-4-acetic acid, melting at 125°-126° C., were obtained representing a yield of 44% on the diisovalerylmethane starting material. was evaporated the residue of crude 3,3-diisovalerylpropionic acid-ethyl ester obtained the mixture was heated to the boiling temperature under reflux for 2 hours The reaction mixture obtained The ester thus recovered the free acid recovered by a procedure analogous to