Krzysztof Staliński

Mieczysław Ma̧kosza; Krzysztof Staliński

Abstract Tertiary carbanions generated from α-substituted phenylacetonitriles in liquid ammonia add to nitro-benzenes in the para position to form the corresponding σH-adducts which are transformed, depending on the starting nitriles and the reaction conditions, to products of oxidative nucleophilic substitution of hydrogen, ONSH or vicarious nucleophilic substitution, VNS.

Mieczysław Mąkosza; Krzysztof Staliński

Abstract In a series of competitive experiments with labelled nitrobenzenes carried out in liquid ammonia at −70 °C it was shown that the rate of oxidative substitution of hydrogen with the carbanion of 2-phenylpropionitrile is ca . 9.8 times faster than the analogous substitution of deuterium in 4-D-nitrobenzene and perdeuterionitrobenzene. Thus C arom. -H bond breaking is the rate limiting step of the oxidative process.

Mieczysław Mąkosza; Krzysztof Staliński; Cezary Klępka

The carbanion of 2-phenylpropionitrile adds to nitrobenzene in the p-position in liquid ammonia to give the relative stable σH-adduct which is oxidised with KMnO4 to 2-phenyl-2-(4-nitrophenyl)propionitrile; the relationships of rates of various reactions in these systems are estimated.

Anita Stępień; Rafał Loska; Piotr Cmoch; Krzysztof Staliński

Radical cyclizations of di-, tri- and tetrapeptides containing N-2-bromobenzyl,N-methyl-substituted alanine or aspartic acid lead in good yields to α,β-unsaturated γ-lactams. The overall cascade, relying on a hydrogen atom transfer-elimination strategy could serve as a way to incorporate a flat and rigid five-membered ring into the peptide framework.

Mieczyslaw Makosza; Krzysztof Staliński

Waldemar Adam; Mieczysław Ma̧kosza; Krzysztof Staliński; Cong Gui Zhao

Mieczysław Mąkosza; Krzysztof Staliński

Leszek Rupnicki; Zofia Urbanczyk-Lipkowska; Anita Stępień; Piotr Cmoch; Zbigniew Pianowski; Krzysztof Staliński

Piotr Cmoch; Zofia Urbanczyk-Lipkowska; Armine Petrosyan; Anita Stępień; Krzysztof Staliński

Robert Andrukiewicz; Rafał Loska; Vladimir Prisyahnyuk; Krzysztof Staliński