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- W2017007521 abstract "Reactions of dilithio-nitroalkanes and dilithio-allynitroalkanes with carbonyl compoundsPrimary nitro compounds can by acylated via dilithium derivatives 5 with carbonic-acid derivatives to give α-nitro esters 6a–i and with carboxylic-acid esters and anhydrides to give α-nitroketones 6j–q. In the reaction of 1-nitro-1-buten with two mol-equiv. of butyllithium, the dilithium compound 10 is formed by successive Michael-addition and nitronate deprotonation. Dilithium derivatives 5 also react with ketones and benzaldehyde (18a–g); the nitro aldols 25 and 26 are likewise formed by addition of doubly deprotonated allylic nitro compounds. Some of the products have been further transformed by reduction or by Nef-reactions to the hydrochloride of the α-amino-acid 26, to 2-amino-alcohols 28a and 28b, to α-hydroxyamino-acid esters 27a–c, to α-hydroxyimino esters 35 and 36, to α-hydroxyimino ketones 31 and 33, to the α-diketone 34, and to the α-keto ester 37." @default.
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- W2017007521 date "1979-10-31" @default.
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- W2017007521 title "Umsetzungen von Dilithio-nitroalkanen und -allylnitroderivaten mit Carbonylverbindungen" @default.
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- W2017007521 doi "https://doi.org/10.1002/hlca.19790620722" @default.
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