Synthesis of the C(26)−C(42) and C(43)−C(67) Pyran-Containing Fragments of Amphidinol 3 via a Common Pyran Intermediate
摘要:
The pyran-containing fragments 1 and 2 of AM3 have been synthesized from the common pyran intermediate 3. Careful orchestration of the alcohol protecting groups was necessary to facilitate deprotection of alcohol functionality in the presence of the chemically sensitive polyene chain.
Concerning the Selective Protection of (Z)-1,5-syn-Ene-diols and (E)-1,5-anti-Ene-diols as Allylic Triethylsilyl Ethers
摘要:
Treatment of unsaturated 1,5-diols 2 with TES-CI (1.1 equiv), imidazole, and catalytic DMAP in 1:1 CH2Cl2-DMF at -78 degrees C effects selective silylation of the allylic alcohol with > 95:5 chemoselectivity when the allylic and homoallylic alcohols are in similar steric environments.
Concerning the Selective Protection of (<i>Z</i>)-1,5-<i>syn</i>-Ene-diols and (<i>E</i>)-1,5-<i>anti</i>-Ene-diols as Allylic Triethylsilyl Ethers
作者:Jacqueline D. Hicks、Chan Woo Huh、Ashley D. Legg、William R. Roush
DOI:10.1021/ol702588h
日期:2007.12.1
Treatment of unsaturated 1,5-diols 2 with TES-CI (1.1 equiv), imidazole, and catalytic DMAP in 1:1 CH2Cl2-DMF at -78 degrees C effects selective silylation of the allylic alcohol with > 95:5 chemoselectivity when the allylic and homoallylic alcohols are in similar steric environments.
Synthesis of the C(26)−C(42) and C(43)−C(67) Pyran-Containing Fragments of Amphidinol 3 via a Common Pyran Intermediate
作者:Jacqueline D. Hicks、William R. Roush
DOI:10.1021/ol703042q
日期:2008.2.1
The pyran-containing fragments 1 and 2 of AM3 have been synthesized from the common pyran intermediate 3. Careful orchestration of the alcohol protecting groups was necessary to facilitate deprotection of alcohol functionality in the presence of the chemically sensitive polyene chain.