biomass accumulation here was considerably faster than that of a Hawaiian montane tropical evergreen forest on the same basaltic lava substrate. We suggest that the faster above-ground biomass development is due to the facilitation effects of N-fixation byAlnus. The inorganic N soil concentration was extremely high on the 37- and 125-yr-old lava flows whereAlnus was dominant. The foliar N concentration inAlnus
Base-Induced Radical Carboamination of Nonactivated Alkenes with Aryldiazonium Salts
作者:Stephanie Kindt、Karina Wicht、Markus R. Heinrich
DOI:10.1021/acs.orglett.5b03143
日期:2015.12.18
transition-metal-free version of the Meerweinarylation has been developed. The key feature of this carboamination-type reaction is the slow base-controlled generation of arylradicalsfrom aryldiazonium tetrafluoroborates, so that a sufficient quantity of diazonium ions remains to enable efficient trapping of the alkyl radical adduct resulting fromarylradical addition to the alkene. Under strongly
The influence of chlorine and sulphonate substituents on the visible absorption maxima of some azo dyes
作者:David Greenwood、Michael G. Hutchings、Brian Lamble
DOI:10.1039/p29860001107
日期:——
A total of 110 arylazo dyes have been prepared, based on five benzenoid and heterocyclic coupling components, and containing combinations of chlorine and sulphonate (sulpho) substituents in the diazo components. Their visibleabsorptionmaxima have been analysed in order to determine the degree to which chloro and sulpho substituentinfluences are constant and transferable, both within a series, and
Reaction of (Cyano)thioacetamide with Arylhydrazones of<i>β</i>-Diketones: Novel Synthesis of 2(1<i>H</i>)-Pyridinethiones, Thieno[2,3-<i>b</i>]pyridines, and Pyrazolo[3,4-<i>b</i>]pyridines
作者:Galal Eldin Hamza Elgemeie、Ali Mahmoud El-Zanate、Abdel-Kader E. Mansour
DOI:10.1246/bcsj.66.555
日期:1993.2
A novel synthesis of 2(1H)-pyridinethiones, thieno[2,3-b]pyridines and pyrazolo[3,4-b]pyridines utilizing (cyano)thioacetamide and arylhydrazones of 1,3-diketones as starting components is described.