Sakamoto, Takao published the artcileSynthesis and reaction of tributylstannylpyrazoles, Quality Control of 141998-77-8, the publication is Heterocycles (1992), 33(2), 813-18, database is CAplus.
1,3-Dipolar cycloaddition reaction of diazomethane and Et 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-phenylpyrazole with tributylstannyl chloride. Iodination, benzoylation, and phenylation of the stannylpyrazoles were examined
Heterocycles published new progress about 141998-77-8. 141998-77-8 belongs to iodides-buliding-blocks, auxiliary class Pyrazole,Iodide,Ester,Pyrazole, name is Ethyl 5-iodo-1H-pyrazole-3-carboxylate, and the molecular formula is C6H7IN2O2, Quality Control of 141998-77-8.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com