Diastereoselective alkylations of acetoacetates of chiral inductors are reviewed. The formed products are starting materials for the preparation of enantiomerically pure amino acids, 4,4‐disub‐stituted 2‐pyrazolin‐5‐ones, and of oxazoles and pyrazoles incorporating the chiral inductors.
Several ruthenium complexes have been tested as catalysts for the cleavage of nitrogen-nitrogen bonds of mono, di and trisubstituted hydrazine derivatives. Better results were obtained using Ru 3 (CO) 12 as catalyst in this type of reactions. Addition of hydrogen sources, such as isopropanol or sodium hydride, to the reaction mixtures has been studied in order to improve the cleavage process.
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ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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