𝔖 Bobbio Scriptorium
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The structure of the bromodilactone from jacobine and the conformation of the lactone group

✍ Scribed by A.McL. Mathieson; J.C. Taylor

Book ID
104242810
Publisher
Elsevier Science
Year
1961
Tongue
French
Weight
140 KB
Volume
2
Category
Article
ISSN
0040-4039

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✦ Synopsis

With regard to the evidence for the structures of the Seneoio jacobaea alkaloids, considerable importance attached to structure assigned to the dilaotone 1 ,293 obtained by acid hydrolysis of jaoobine. Because of the oritical role of this derivative, an X-ray analysis of the bromodilactone of jaoobine the WM initiated 4 .

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Complete analyses of the proton and carbon chemical-shift assignments of D-mannurono-y-lactone (1) have been achieved by 1D and 2D NMR spectral measurements. At equilibrium, the anomeric LY and p forms were present in the ratio of 34:66 in D,O and 72:28 in Me,SO-d,. The solution data indicated tha