Synthesis and reaction of tributylstannylpyrazoles

Takao Sakamoto, Futoshi Shiga, Daishi Uchiyama, Yoshinori Kondo, Hiroshi Yamanaka

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


1,3-Dipolar cycloaddition reaction of diazomethane and ethyl diazoacetate with tributylstannylacetylenes occurred regioselectively to afford the corresponding 3(5)-tributylstannylpyrazoles. The cycloaddition reaction of 3-phenylsydnone with the stannylacetylenes proceeded also regioselectively, and 3-tributylstannyl-1-phenylpyrazoles were isolated. 4-Tributylannyl- and 5-tributylstannyl-1-phenylstpyrazole were prepared by the stannylation of 4-lithio- and 5-lithio-1-phenylpyrazoles with tributylstannyl chloride. Iodinatton, benzoylation, and phenylation of the stannylpyrazoles were examined.

Original languageEnglish
Pages (from-to)813-818
Number of pages6
Issue number2
Publication statusPublished - 1992 Apr 1

ASJC Scopus subject areas

  • Organic Chemistry


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