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R. G. Kostyanovsky A. P. Pleshkova V. N. Voznesensky Yu. I. El'natanov 《Journal of mass spectrometry : JMS》1980,15(8):397-411
New data have been obtained confirming distinct differences in fragmentation of compounds of trivalent nitrogen and other group V elements under electron impact. These data have been obtained for the fragmentation of the cyanamides, cyanphosphines and cyanarsines, as well as of their vinylogues. 相似文献
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I. V. Vystorop N. P. Konovalova Yu. V. Nelyubina A. V. Chernyak T. E. Sashenkova E. N. Klimanova A. N. Utienyshev B. S. Fedorov G. V. Shilov R. G. Kostyanovsky 《Russian Chemical Bulletin》2013,62(5):1272-1281
Regioselective cyclocondensation of glycine hydroxamic and dl-alanine hydroxamic acids with 1-methylpiperidin-4-one gave 1-hydroxy-8-methyl-1,4,8-triazaspiro[4.5]decan-2-one (5) and (±)-1-hydroxy-3,8-dimethyl-1,4,8-triazaspiro[4.5]decan-2-one (6), respectively. The X-ray diffraction data showed that acid 6 formed racemic crystals with two independent molecules, whose structure was studied and compared with the analog obtained earlier. The in vivo tests on the leukemia P388 and L1210 models showed that the low-toxic spirocyclic hydroxamic acids 5 and 6 were the adjuvants of clinic cytostatics cisplatin and cyclophosphamide. Chemotherapy of the leukemias P388 and L1210 was more efficient with the combination of acid 6 with cisplatin and cyclophosphamide, respectively. 相似文献
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The ORD and CD spectra of 2-methyl-aziridine, azetidine, pyrrolidine, piperidine, their N-Me, N-Hal, N-CN derivatives as well as those of camphidine, N-methyl- and N-cyano-camphidine have been investigated. The possibility of application of the quadrant rule for N-chloroamines is discussed. A similar rule is proposed for the N-CN chromophore. 相似文献
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