Studies of nitrile oxide cycloadditions, and the phenolic oxidative coupling of vanillin aldoxime by Geobacillus sp. DDS012 from Italian rye grass silage
作者:David R. Kelly、Simon C. Baker、David S. King、Deepa S. de Silva、Gwyn Lord、Jason P. Taylor
DOI:10.1039/b716915a
日期:——
corresponding nitrileoxide, but preparation of the supposed adduct and model studies excluded this possibility. The rate constant for the second order dimerisation of 4-O-acetyl vanillin nitrileoxide was measured (1.21 x 10(-4) M(-1) s(-1), 0.413 M, 25 degrees C) and the (13)C-NMR signal for the nitrileoxide carbon was observed (delta(C) 34.4, br. t (1)J(13)C,(14)N circa 50 Hz). Treatment of vanillin aldoxime
在针对从嗜热菌中发现腈水解酶的研究过程中,将香草醛醛肟与嗜热生物体Geobacillus sp。一起孵育。从意大利黑麦草(黑麦草)青贮饲料中分离出的DDS012。主要产物是二氢二聚体,其只能通过LC-MS表征。最初认为这是香兰素醛肟与相应的一氧化氮环加成的产物,但是假定的加合物的制备和模型研究排除了这种可能性。测量了4-O-乙酰香兰素一氧化二氮的二阶二聚反应的速率常数(1.21 x 10(-4)M(-1)s(-1),0.413 M,25摄氏度),而(13)观察到了丁腈碳的C-NMR信号(δ(C)34.4,t(1)J(13)C,(14)N约50 Hz)。