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Total Syntheses of Naturally Occurring Diacetylenic Spiroacetal Enol Ethers

✍ Scribed by Miyakoshi, Naoki; Aburano, Daisuke; Mukai, Chisato


Book ID
127291733
Publisher
American Chemical Society
Year
2005
Tongue
English
Weight
179 KB
Volume
70
Category
Article
ISSN
0022-3263

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πŸ“œ SIMILAR VOLUMES


Naturally occurring thienyl-substituted
✍ Hofer, Otmar ;WallnΓΆfer, Bruno ;Widhalm, Michael ;Greger, Harald πŸ“‚ Article πŸ“… 1988 πŸ› John Wiley and Sons 🌐 English βš– 526 KB

i n addition to the already known 2-(2-thienylmethylene)-l,6dioxaspiro[4.S]dec-3-ene (l), a hitherto unknown thienyl-substituted spiroacetal enol ether was isolated from the subterranean parts of Arreniisia ludoviciana, the structure of which was eluci-

Absolute Configurations of Three Natural
✍ Wurz, Gerald ;Hofer, Otmar ;Sanz-Cervera, Juan F. ;Marco, J. Alberto πŸ“‚ Article πŸ“… 1993 πŸ› John Wiley and Sons 🌐 English βš– 307 KB

## Abstract The absolute configurations of three 6,7‐oxygenated acetylenic spiroacetal enol ethers were determined by using the kinetic method of Horeau. The results were confirmed by the circular dichroism of the compounds in correlation with the corresponding 6,7‐epoxide.

Highly stereoselective syntheses of spir
✍ Hiroaki Toshima; Hisateru Aramaki; Furumoto Yoshinori; Shintaro Inamura; Akitami πŸ“‚ Article πŸ“… 1998 πŸ› Elsevier Science 🌐 French βš– 849 KB

E)-and (Z)-2-methoxyca\_rbonylmethylene-l,6-dioxaspiro[4.5]decanes have been synthesized from an aeydie keto alcohol possessing an alkynoate past via intr, maoleculat conjugate addition. Unde~ thermodynamically controlled conditions using t-BuOK in THF, the (E)-isomer could be obtained in 52:1 ratio

Synthetic study on naturally occurring a
✍ Hiroaki Toshima; Hisateru Aramaki; Akitami Ichihara πŸ“‚ Article πŸ“… 1999 πŸ› Elsevier Science 🌐 French βš– 288 KB

Optically active 3,4-diacetoxy-2-formylmethylene-l,6-dioxaspiro[4.5]decanes have been synthesized from an acyclic keto-alcohol possessing an unsaturated aldehyde part via intmmolecular conjugate addition. The C3-and C4-ste~ogenic centers were introduced via Shatpless asymmetric dihydroxylation of an