Synthetic application of the diels-alder adduct of β-trans-ocimene and maleic anhydride—II

Tetrahedron ◽  
1967 ◽  
Vol 23 (7) ◽  
pp. 3215-3220
Author(s):  
K.T. Joseph ◽  
G.S. Krishna Rao
2000 ◽  
Vol 65 (3) ◽  
pp. 147-156 ◽  
Author(s):  
Lidija Bondarenko-Gheorghiu ◽  
Ljubinka Lorenc ◽  
Mihailo Mihailovi]

The Diels-Alder adduct (3), obtained by cycloaddition of 7-dehydrocholesteryl acetate (1) and maleic anhydride (2), was heated at ca. 90?C with a large excess of lead tetraacetate in pyridine solution for 5h. Under these conditions, compound 3 underwent lactonization with the participation of the olefinic ?6-double bond to give two isomeric monolactone derivatives, 9 and 10 (in a total yield of ca. 6%), and the bislactone product 11 (in 11.5% yield). The starting material was recovered in 36% yield.


1974 ◽  
Vol 6 (2) ◽  
pp. 121-131 ◽  
Author(s):  
Bunzo Kamo ◽  
Isamu Morita ◽  
Satoshi Horie ◽  
Shijo Furusawa

ChemInform ◽  
2000 ◽  
Vol 31 (38) ◽  
pp. no-no
Author(s):  
Richard T. Brown ◽  
Simon B. Jameson ◽  
Dehimi Ouali ◽  
Peter I. Tattersall

Synlett ◽  
2021 ◽  
Author(s):  
Shuhei Hori ◽  
Sho Ishida ◽  
Go Ito ◽  
Koji Sugiyama ◽  
Chiharu Yuki ◽  
...  

4,5,6,7-Tetrahydroisobenzofurans, corresponding to the AC(D)E ring structure of viridin and equipped with required substituents on the A-ring, were synthesized via the Diels-Alder adduct of a furan derivative and maleic anhydride with high regio- and stereoselectivities. The key steps of this work include the regioselective opening of the tetrahydrofuran, stereoselective epoxidation, and AlMe3-mediated regioselective epoxide opening followed by stereoselective C-methylation.


1979 ◽  
Vol 57 (3) ◽  
pp. 314-317 ◽  
Author(s):  
John N. Bridson

N-3′-Furylbenzamide gives a conventional Diels–Alder adduct with maleic anhydride but with dimethyl maleate and methyl acrylate further reactions take place at the enamide grouping of the initially formed adducts. Compounds have been isolated in which molecules of an alcohol, used as solvent, or the starting furan have added to the double bond of the 1:1 adducts. In the first case unstable alkoxyamides are formed; in the second stable 2:1 adducts result from a novel uncatalysed addition to the double bond of the enamide. The stereochemistry of these and related compounds is discussed.


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