Absolute configuration of eldanolide, the wing gland pheromone of the male African sugar cane borer, Eldana saccharina (Wlk.) syntheses of its (+) and (−) enantiomers.
The isolation and structure determination of eldanolide, the wing gland pheromone of the male African Sugar Cane Borer, Eldana saccharina (Wlk.) is described. The absolute configuration was determined as (3S, 4R) by comparison of the CD spectra of the natural pheromone with both synthetic enantiomers.
Optically active five-membered oxygen-containing rings. A synthesis of (+)-eldanolide
作者:Robert Bloch、Matar Seck
DOI:10.1016/s0040-4020(01)89234-6
日期:1989.1
Michael reactions followed by a retro Diels-Alder cleavage convert the optically active tricyclic lactol 1 into 2-substituted 2.5-dihydrofurans of high enantiomeric purities. These compounds are useful synthons for the obtention of natural butenolides and butanolides as illustrated by the synthesis of the pheromone (+)-eldanolide.
Nitro alkanes in organic synthesis: An efficient stereoselective synthesis of (+)-trans whisky lactone and (+)-eldanolide from nitro alkane synthons and using bakers' yeast reduction as the key step
作者:Bhabani K Sarmah、Nabin C Barua
DOI:10.1016/s0040-4020(01)80369-0
日期:1993.3
An efficient route using nitroalkane synthon 3a and 3b for the synthesis of optically pure R-(+)-trans whisky lactone, (+)-9 and R-(+)-eldanolide, (+)-10 is described. In a key step, bakers' yeastreduction is employed to get the required chirality.
Reactions of some -ribonolactone derivatives with alkyl cuprates synthesis of (+)-eldanolide and (+)--cognac lactone
作者:Rosa M. Ortuño、Ramon Merce、Josep Font
DOI:10.1016/s0040-4020(01)90327-8
日期:1987.1
Reactions of some -ribonolactone derivatives with alkyl cuprates have been investigated in order to obtain molecules with a (4,5)-4,5-dialkyldihydro-2(3)-furanone type constitution. As a direct application, (+)-eldanolide and (+)--cognac lactone have been synthetized.
Pd(0)-Catalyzed Hydrogenolysis of Allylic and Dienylic Cyclic Carbonates: Synthesis of Optically Active Homoallylic Alcohols and Allylic Alcohols
作者:Suk-Ku Kang、Dong-Chul Park、Ho-Sik Rho、Chan-Mo Yu、Jang-Hoo Hong
DOI:10.1080/00397919508010808
日期:1995.1
Abstract Treatment of chiral allyliccycliccarbonates with ammonium formate in the presence of Pd(0) catalyst afforded optically active homoallylic alcohols with excellent regioselectivity. However, hydrogenolysis of dienyliccycliccarbonates in the presence of Pd(0) catalyst afforded conjugated or nonconjugated (E)-dienylic alcohols depending on Pd complexes used. Using homoallylic alcohol 3c as