Abstract:
A PROCESS FOR PREPARING NITRO BENZOPHENONES WHICH INVOLVES ADDING NITRIC ACID TO A DIARYLALKANE AND MAINTAINING THE RESULTING MIXTURE AT THE REACTION TEMPERATURE FOR A TIME SUFFICIENT TO CONVERT THE DIARYLALKANE TO THE CORRESPONDING NITRO BENZOPHENONE.
Abstract:
A METHOD OF PREPARING CYCLIC NITROKETONES WHICH COMPRISES GRADUALLY ADDING ACETYL NITRATE TO THE ENOL ACETATE OF THE UNNITRATED CYCLIC KETONE, WHEREBY THE AMOUNT OF ACETYL NITRATE IS KEPT AT LESS THAN EXCESS, BASED ON THE ENOL ACETATE OF THE KETONE, IN THE REACTION MIXTURE OVER SUBSTANTIALLY THE TIME REQUIRED FOR THE REACTION TO OCCUR.
Abstract:
Disclosed herein is a simple process for functionalization/grafting of carbon microspheres obtained from bagasse with various active functional groups onto it and use of the same as catalyst for various organic reactions, having very high selectivity and conversion rate.
Abstract:
This invention relates generally to enantiomerically enriched C—H activated ruthenium olefin metathesis catalyst compounds which are stereogenic at ruthenium, to the preparation of such compounds, and the use of such catalysts in the metathesis of olefins and olefin compounds, more particularly, in the use of such catalysts in enantio- and Z-selective olefin metathesis reactions. The invention has utility in the fields of catalysis, organic synthesis, polymer chemistry, and industrial and fine chemicals chemistry.
Abstract:
Methods and compositions are provided for the direct catalytic asymmetric aldol reaction of aldehydes with donor molecules selected from ketones and nitroalkyl compounds. The reactions employ as catalyst a Group 2A or Group 2B metal complex of a ligand of formula I, as defined further herein. 1
Abstract:
A process for the preparation of 5-nitro-1,4-naphthoquinones of formula ##STR1## wherein R is hydrogen, a C.sub.1 -C.sub.4 alkyl radical or a C.sub.1 -C.sub.4 alkoxy radical, by oxidation of 1-nitronaphthalene or a suitably substituted 1-nitronaphthalene, which process comprises carrying out the reaction with manganese(III) sulfate as oxidizing agent or a mixture of manganese(III) sulfate and cerium sulfate.The maganese(III) sulfate consumed can be regenerated electrolytically with good current yield. The process is environmentally safe, as the oxidizing agent and the solvent, if any, can be reused.