Studies on anti-Fusarium disease activity of aminonitrile derivatives. III. Preventive activity of N-allylamino acids against Fusarium diseases and their mode of action.
Thirty-two N-allylamino acids were prepared, and their preventive activity against Fusarium diseases was determined. Esters of N-allyl-glycine and -sarcosine showed a strong effect in preventing yellows of the Japanese radish caused by Fusarium oxysporuwn f. sp. raphani. These compounds were also effective against Fusarium wilt of tomato by foliage treatment. The preventive activity of N-allylsarcosinates varied insignificantly with the variation of the alcohol moiety of the esters. Although n-dodecyl N-allylsarcosinate was shown to effectively control Fusarium diseases, it did not affect the growth of Fusarium on an agar medium. The preventive effect was dependent on the application time. Enhancement of the peroxidase activity and the accumulation of total phenols were seen in the plants treated with these chemicals.
A three component, rhodium-catalyzed isomerisation/1,3-dipolar cycloaddition reaction is described for the synthesis of fused ring heterocycles as endo/exo isomers, with the formation of three new bonds and four stereocenters.
The catalytic effectiveness of ruthenium porphyrins for ylide generation in reactions of ethyl diazoacetate and diisopropyl diazomethylphosphonate with allylic amines, sulfides and iodides is described for the first time. These reactions result mainly in products of the [2,3]-sigmatropicrearrangement of intermediate allylic ylides.
3]-sigmatropic rearrangement of quaternary allylic ammonium ylides via in situ activation of tertiary allylicamines with arynes under mild conditions. Using 2-(trimethylsilyl)aryl triflates as aryne precursors, a range of tertiary allylicamines bearing electron-withdrawing groups underwent [2,3]-sigmatropic rearrangement to furnish structurally diverse homoallylic amines in moderate to good yields. The reaction
A new strategy has been established for the synthesis of polysubstituted morpholin‐2‐ones through Stevens rearrangements of tertiary amines via in situ activation with epoxides. A range of α‐amino acid‐derived tertiary allylic, propargylic, and benzylic amines reacted with epoxides in the presence of zinc halide catalysts to afford structurally diverse allyl‐, allenyl‐, and benzyl‐substituted morpholin‐2‐ones