Journal
ORGANIC & BIOMOLECULAR CHEMISTRY
Volume 17, Issue 15, Pages 3819-3824Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ob00547a
Keywords
-
Categories
Funding
- Labex SynOrg [ANR-11-LABX-0029]
- CNRS
- University of Rouen
Ask authors/readers for more resources
The total synthesis of spiromastilactone A is reported for the first time. A swift strategy is presented that involves a pivotal enantioselective nucleophilic 1,2-alkylation of an aldehyde prepared in four quantitative synthetic steps from commercial 2,4-dihydroxybenzoic acid. This key reaction, which was described very recently by our group and carried out here on a gram scale, involves cheap and easily accessible tricoordinated chiral lithium amido zincates. The resulting enantioenriched secondary alcohol is involved afterward in an efficient intramolecular cyclization providing the phthalide core of the target, and two quantitative additional steps aiming to deprotect the phenol groups then introduce chlorine atoms end the synthetic scheme. Spiromastilactone A is obtained in 44% overall yield in eight synthetic steps, among which six are quantitative, and the 89 : 11 enantiomeric ratio (78% ee value) is in favor of the right enantiomer (R configuration).
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available