中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (5R,2E)-5-(tert-butyl-dimethyl-silyloxy)-hex-2-enoic acid ethyl ester | 154568-30-6 | C14H28O3Si | 272.46 |
—— | (R)-tert-butyl(hept-6-en-2-yloxy)dimethylsilane | 393109-07-4 | C13H28OSi | 228.45 |
—— | (-)-(5R)-5-(tert-butyldimethylsilyloxy)-hexanal | 121785-59-9 | C12H26O2Si | 230.423 |
—— | ethyl (R)-5-(tert-butyldimethylsiloxy)hexanoate | 174419-62-6 | C14H30O3Si | 274.476 |
—— | methyl (R)-(-)-3-(tert-butyldimethylsilyloxy)butyrate | 104524-19-8 | C11H24O3Si | 232.395 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | (R,E)-7-(tert-butyldimethylsilyloxy)oct-2-en-1-ol | 174419-63-7 | C14H30O2Si | 258.476 |
—— | tert-Butyl-((E)-(R)-7-chloro-1-methyl-hept-5-enyloxy)-dimethyl-silane | 174419-64-8 | C14H29ClOSi | 276.922 |
A stereoselective synthetic strategy toward (+)-paecilomycin F is reported. The approach utilizes readily available commercial 2,4,6-trihydroxy benzoic acid and easily accessible chiral R(+)-propylene oxide as starting materials.
The synthesis involves regioselective Grignard reaction, Wittig reaction, Sharpless asymmetric dihydroxylation, Barbier-type allylation, Stille-coupling and ring-closing metathesis as key reactions.
The target molecule is produced in a 7-step linear sequence with an overall yield of 20% starting from 2,4,6-trihydroxy benzoic acid or a 12-step sequence with an overall yield of 12.95% starting from R(+)-propylene oxide.
The aromatic fragment synthesis was achieved using earlier known protocols starting from 2,4,6-trihydroxy benzoic acid (vide infra).