Efficient Asymmetric Synthesis of cis-4-Formyl .beta.-Lactams from L-(+)-Tartaric Acid

1994 ◽  
Vol 59 (4) ◽  
pp. 932-934 ◽  
Author(s):  
M. Jayaraman ◽  
A. R. A. S. Deshmukh ◽  
B. M. Bhawal
2010 ◽  
Vol 63 (3) ◽  
pp. 529 ◽  
Author(s):  
Leon S.-M. Wong ◽  
Kathleen A. Turner ◽  
Jonathan M. White ◽  
Andrew B. Holmes ◽  
John H. Ryan

The synthesis of a hydroxylated vinyl-appended lactone, in five synthetic steps from tartaric acid, is reported. The C2-symmetrical bis-vinyl diol 12 was converted into the ketene acetal 14 via methylenation of the cyclic carbonate 13 or thermal elimination of benzeneselenenic acid from the selenoxide 17. In both cases, the in situ generated ketene acetal 14 underwent spontaneous Claisen rearrangement to give the nine-membered lactone (+)-15. Lactones of this type are potentially advanced precursors to simplified eleutherobin analogues or other medium-ring lactone natural products.


ChemInform ◽  
2010 ◽  
Vol 25 (29) ◽  
pp. no-no
Author(s):  
M. JAYARAMAN ◽  
A. R. A. S. DESHMUKH ◽  
B. M. BHAWAL

2006 ◽  
Vol 71 (18) ◽  
pp. 7083-7086 ◽  
Author(s):  
Willem Van Brabandt ◽  
Matthieu Vanwalleghem ◽  
Matthias D'hoogh ◽  
Norbert De Kimpe

1986 ◽  
Vol 108 (19) ◽  
pp. 6054-6056 ◽  
Author(s):  
David J. Hart ◽  
Chih Shone. Lee ◽  
William H. Pirkle ◽  
Myung Ho. Hyon ◽  
Athanasios. Tsipouras

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