141998-91-6Relevant academic research and scientific papers
SYNTHESIS AND REACTION OF TRIBUTYLSTANNYLPYRAZOLES
Sakamoto, Takao,Shiga, Futoshi,Uchiyama, Daishi,Kondo, Yoshinori,Yamanaka, Hiroshi
, p. 813 - 818 (2007/10/02)
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-Tributylstannyl- and 5-tributylstannyl-1-phenylpyrazole were prepared by the stannylation of 4-lithio- and 5-lithio-1-phenylpyrazoles with tributylstannyl chloride.Iodination, benzoylation, and phenylation of the stannylpyrazoles were examined.
