2019
DOI: 10.5155/eurjchem.10.4.367-375.1915
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Synthesis and characterization of new 3,3`-bipyrazole-4,4`-dicarboxylic acid derivatives and some of their palladium(II) complexes as pre-catalyst for Suzuki coupling reaction in water

Abstract: The 1,3-dipolar cycloaddition reaction of bis-hydrazonyl chlorides with methyl propiolate afforded dimethyl 1,1¢-aryl-3,3`-bipyrazole-4,4`-dicarboxylates (5a,b). Heating the later compound 5a with a mixture of HCl/AcOH gave 3,3`-bipyrazole-5,5`-dicarboxylic acid derivative 6. Treatment of the hydrazonoyl chloride (1a) and 3,3`-bipyrazole-5,5`-dicarboxylic acid (6) with palladium(II) chloride gave the corresponding Pd-complexes 7 and 8, respectively. The catalytic activity of the prepared Pd-complexes was exami… Show more

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Cited by 2 publications
(3 citation statements)
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“…Treatment of 3,3′‐bipyrazole‐5,5′‐dicarboxylic acid 43 with a solution of palladium(II) chloride in methanol furnished the Pd(II)‐complex 46 in 63 % yield. The 3,3′‐bipyrazole‐based Pd(II)‐complex 46 was employed as a good catalyst for Suzuki C−C cross‐coupling reactions [51,52] …”
Section: Synthetic Routes To Bipyrazolesmentioning
confidence: 99%
See 1 more Smart Citation
“…Treatment of 3,3′‐bipyrazole‐5,5′‐dicarboxylic acid 43 with a solution of palladium(II) chloride in methanol furnished the Pd(II)‐complex 46 in 63 % yield. The 3,3′‐bipyrazole‐based Pd(II)‐complex 46 was employed as a good catalyst for Suzuki C−C cross‐coupling reactions [51,52] …”
Section: Synthetic Routes To Bipyrazolesmentioning
confidence: 99%
“…The 3,3'-bipyrazole-based Pd(II)complex 46 was employed as a good catalyst for Suzuki CÀ C cross-coupling reactions. [51,52] Double 1,3-dipolar cycloaddition reaction of the bisnitrilimine 38 A with two equivalents of 2-arylidene-1-benzosuberone derivatives 47 was reported to give the bis-[1',4'-diaryl-1-oxo-spiro-benzosuberane-2,5'-pyrazoline] derivatives 48 (Scheme 8). The reaction was carried out under both thermal heating (at reflux for 36 h) as well as ultrasonic irradiation conditions (at 70°C for 3 h) in ethanol in the presence of triethylamine.…”
Section: Synthesis Of 33'-bipyrazole Derivativesmentioning
confidence: 99%
“…Kinetics is an important aspect of any reaction; especially for organic reactions [11][12][13][14][15]. The kinetics give us important data about the reaction.…”
Section: The Rate Law For Cannizzaro Reactionmentioning
confidence: 99%