Synthesis of deuterium and tritium labelled 7-hydroxy- and 7-oxosterols
摘要:
Deuterium and tritium 3,7-bis-labelled 7-hydroxysterols 3 - 5 were prepared by reduction of the 3,7-dioxosterols 1, 2 with (NaBH4)-H-2 and (NaBH4)-H-3. Regioselective oxidation of the deuterium 3,7-bis-labelled 7-hydroxysterols 3, 4 with CrO3/DMP led to the 3-labelled 7-oxosterols 6, 7. The 3,7-dioxosterols 1, 2 were synthesized starting from cholesterol and beta-sitosterol.
Synthesis of deuterium and tritium labelled 7-hydroxy- and 7-oxosterols
摘要:
Deuterium and tritium 3,7-bis-labelled 7-hydroxysterols 3 - 5 were prepared by reduction of the 3,7-dioxosterols 1, 2 with (NaBH4)-H-2 and (NaBH4)-H-3. Regioselective oxidation of the deuterium 3,7-bis-labelled 7-hydroxysterols 3, 4 with CrO3/DMP led to the 3-labelled 7-oxosterols 6, 7. The 3,7-dioxosterols 1, 2 were synthesized starting from cholesterol and beta-sitosterol.
Deuterium and tritium 3,7-bis-labelled 7-hydroxysterols 3 - 5 were prepared by reduction of the 3,7-dioxosterols 1, 2 with (NaBH4)-H-2 and (NaBH4)-H-3. Regioselective oxidation of the deuterium 3,7-bis-labelled 7-hydroxysterols 3, 4 with CrO3/DMP led to the 3-labelled 7-oxosterols 6, 7. The 3,7-dioxosterols 1, 2 were synthesized starting from cholesterol and beta-sitosterol.