نتایج جستجو برای: Atom economic
تعداد نتایج: 363960 فیلتر نتایج به سال:
For the first time B-podands have been studied as an efficient and powerful catalysts in the ring opening of epoxides with azide anion in water. The reaction afforded the corresponding 1,2-azidoalcohols with high regioselectivity under mild reaction conditions and in a highly atom economic fashion.
For the first time B-podands have been studied as an efficient and powerful catalysts in the ring opening of epoxides with azide anion in water. The reaction afforded the corresponding 1,2-azidoalcohols with high regioselectivity under mild reaction conditions and in a highly atom economic fashion.
The beginning of the 21st century has seen tremendous growth in the field of decarboxylative activation. Benzoic acid derivatives are now recognised as atom-economic alternatives to traditional cross-coupling partners, and they also benefit from being inexpensive, readily available and shelf-stable reagents. In this microreview we discuss recent developments in the coupling of benzoic acid deri...
nowadays in trade and economic issues, prediction is proposed as the most important branch of science. existence of effective variables, caused various sectors of the economic and business executives to prefer having mechanisms which can be used in their decisions. in recent years, several advances have led to various challenges in the science of forecasting. economical managers in various fi...
Transition-metal-free synthesis of 4-pyrones via TfOH-promoted nucleophilic addition/cyclization of diynones and water has been developed. This transformation is simple, atom economical and environmentally benign, providing rapid and efficient access to substituted 4-pyrones.
for the first time b-podands have been studied as an efficient and powerful catalysts in the ring opening of epoxides with azide anion in water. the reaction afforded the corresponding 1,2-azidoalcohols with high regioselectivity under mild reaction conditions and in a highly atom economic fashion.
Three improved thiophosphoroselenenylation procedures of CH-acids, including derivatives malonic and acetyl-, phosphono-, 4-nitrophenyl- 3-pyridylacetic acids, have been described compared to previously reported thiophosphoroselenylation diethyl malonate using bis(disopropoxyphosphinothioyl)diselenide alone or with the aid methyl iodide. The use iodine makes it possible utilize both equivalents...
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