MECHANISM FOR THE PHOTOLYSIS OF THE NATURALLY-OCCURRING ISOXAZOLIN-5-ONES AND THE LINK WITH THE LATHYRUS TOXINS

被引:8
作者
DEBRUYN, A
VERHEGGE, G
LAMBEIN, F
机构
[1] STATE UNIV GHENT,PHYSIOL CHEM LAB,KL LEDEGANCKSTR 35,B-9000 GHENT,BELGIUM
[2] STATE UNIV GHENT,ORGAN CHEM LAB,B-9000 GHENT,BELGIUM
关键词
LATHYRUS SPECIES; ISOXAZOLIN-5-ONES; AMINO ACIDS; PHOTODEGRADATION; LATHYRISM; TOXICITY;
D O I
10.1055/s-2006-961419
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
In aqueous solution, N-substituted isoxazolin-5-one derivatives, which occur in high amounts in seedlings of the tribe Vicieae, can be shown to undergo a proton exchange at C-4, indicative of their aromatic character. Under UV-light these different isoxazolin-5-one derivatives are then broken down, each following the same degradation scheme, some of them forming the well-known toxins of the genus Lathyrus. The loss of aromatic character and the addition of two water molecules is proposed as the underlying mechanism for this photolysis. The biochemical relation between isoxazolin-5-ones and the Lathyrus toxins is discussed.
引用
收藏
页码:159 / 162
页数:4
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