Reductions of CO and CN groups with the systems composed of (η5-C5H5)2MoH2 and acids
摘要:
Selective reductions of organic compounds, such as carbonyl compounds and imines, using a system composed of Cp2MoH2 and acids are examined. This system can reduce the substrates under mild conditions. Extremely high diastereoselectivity was achieved in the reduction of 4-t-butylcyclohexanone. The reactivity of imines depends on their structure. Aromatic imines are found to be more reactive than aliphatic imines. (C) 1998 Elsevier Science S.A. All rights reserved.
SYNTHESIS OF SOME NEW CYCLIC AMINOPHOSPHONATES AND THEIR PHYSIOLOGICAL ACTIVITIES
作者:J. S. Wieczorek、R. Gancarz、K. Bielecki、E. Grzyś、J. Sarapuk
DOI:10.1080/10426500108040237
日期:2001.8.1
The synthesis of 19 newly synthesized cyclic aminophosphonic acid derivatives was described and their biological activity studied. It was found, as in the case of the previously described series of acyclic analogues, that the phytotoxicity of the compounds, tested on aquatic plant Spirodela oligorrhiza depended mainly on their hydrophobic parameters. The most pronounced phytotoxicity, the measure of which was concentration of aminophosphonates causing 50% inhibition of plant growth (EC50), exhibited compounds with not too long hydrocarbon substituent on the nitrogen atom (8-10 carbon atoms) and branched propyl groups on the phosphorus atom. The test had preliminary character and permitted to eliminate the less promising compounds for further studies.