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.
N-Alkylation and [2,3]-sigmatropic rearrangement of N-allyl α-amino esters
作者:Iain Coldham、Mark L. Middleton、Philip L. Taylor
DOI:10.1039/a705550a
日期:——
N-Alkylation of N-allyl α-amino esters and [2,3]-Stevens rearrangement occur in one pot on warming in the solvent DMF, with the bases K2CO3 and DBU; this in situ formation of the quaternary ammonium salts and rearrangement of the subsequent ylides gives N,N-dialkylated allyl glycine derivatives.
Strain-release C–C bond cleavage enables the [2,3]-sigmatropic rearrangement of tertiary allylamines
作者:Rui-Han Dai、Lu Han、Qi Wang、Shi-Kai Tian
DOI:10.1039/d1cc03141d
日期:——
strategy has been established for the [2,3]-sigmatropicrearrangement of quaternary allylammonium ylides, generated in situ from tertiary allylamines and a bicyclo[1.1.0]butane via strain-release C–C bond cleavage. A range of tertiary allylamines with an acidic α-C–H bond participated in the 1-sulfonylbicyclo[1.1.0]butane-mediated [2,3]-sigmatropicrearrangement, delivering structurally diverse N-cyclobutyl
Chiral ammonium-oxocarbenium dications are accumulated in superacid through a tandem diastereoselective proton-transfer/intramolecular cyclization. Their reactivity in the diastereoselective remote functionalization of non-activated alkene is explored.