Hetru, C. published the artcileSynthesis of high specific activity (23,24)-3H4-2-deoxyecdysone, Quality Control of 27943-46-0, the publication is Nouveau Journal de Chimie (1983), 7(10), 587-91, database is CAplus.
Deoxyecdysone I (R = H) was prepared from ergosterol via alkynylation of pregnenecarboxaldehyde II with R1OCMe2CCMgBr (R1 = tetrahydro-2H-pyran-2-yl) to give cholestenynones III. Reduction of cholestenyne IV by tritium in MeOH containing Pd/C and NaNO2 gave I (R = T) with a specific activity of 108 Ci/mmole. I (R = H) has biolog. activity similar to that of ecdysone and is metabolized to ecdysone and 20-hydroxyecdysone by insects.
Nouveau Journal de Chimie published new progress about 27943-46-0. 27943-46-0 belongs to tetrahydropyran, auxiliary class Tetrahydropyran,Alkynyl,Ether, name is 2-((2-Methylbut-3-yn-2-yl)oxy)tetrahydro-2H-pyran, and the molecular formula is C10H16O2, Quality Control of 27943-46-0.
Referemce:
https://en.wikipedia.org/wiki/Tetrahydropyran,
Tetrahydropyran – an overview | ScienceDirect Topics