引用本文:
Shrong Shi LIN, Jian Mei WANG, Cheng Yong LI. The Reactivity of 2,4,6-Tirphenylpyridinium Ylids[J]. Chinese Chemical Letters,
2003, 14(2): 111-114.
Citation: Shrong Shi LIN, Jian Mei WANG, Cheng Yong LI. The Reactivity of 2,4,6-Tirphenylpyridinium Ylids[J]. Chinese Chemical Letters, 2003, 14(2): 111-114.
Citation: Shrong Shi LIN, Jian Mei WANG, Cheng Yong LI. The Reactivity of 2,4,6-Tirphenylpyridinium Ylids[J]. Chinese Chemical Letters, 2003, 14(2): 111-114.
The Reactivity of 2,4,6-Tirphenylpyridinium Ylids
摘要:
Triphenylpyridinium ylid 2, generated by the decarboxylation of betaine 1, were noted to react with acetyl chloride, chloroform or acetone to form addition-elimination product and proton extraction-carbanion addition products, respectively.The reaction with chloroform was determined as pseudo first order from kinetic experiments.The values of kobsd and t1/2 for decarboxylation at 20, 40 and 50℃ were calculated to be 4.6×10-4, 8.8×10-3, 2.8×10-2min-1 and 1.5×103, 78, 24 minutes, respectively.
English
The Reactivity of 2,4,6-Tirphenylpyridinium Ylids
Abstract:
Triphenylpyridinium ylid 2, generated by the decarboxylation of betaine 1, were noted to react with acetyl chloride, chloroform or acetone to form addition-elimination product and proton extraction-carbanion addition products, respectively.The reaction with chloroform was determined as pseudo first order from kinetic experiments.The values of kobsd and t1/2 for decarboxylation at 20, 40 and 50℃ were calculated to be 4.6×10-4, 8.8×10-3, 2.8×10-2min-1 and 1.5×103, 78, 24 minutes, respectively.
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Key words:
- Pyridinium ylid
- / pyridinium betaine
- / 4-H pyridine
- / kinetic experiment
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