Rh(II)-carbenoid insertion into chiron substrates for stereoselective amino acid construction

The focus has been on the development of methodology for stereoselective preparation of spiroannulated intermediates of the Schöllkopf chiron and further transformations to cyclic alpha-amino acids. The spiroannulations are effected by Ru(II)-catalysed ring-closing metathesis reactions, by Ru(II)- and Pd(0)-catalysed cycloisomerisations, by Rh(II)-carbenoid cyclisation reactions and by intramolecular aldol condensations. Hydrolytic reactions of the spirane intermediates have provided several groups of highly novel and functionalised five-, six- and seven-membered cyclic alpha-quaternary-alpha-amino acid derivatives as well as alicyclic derivatives. The novel cyclic amino acid derivatives can be regarded as cyclic constrained analogues of corresponding common amino acids, or in some cases as intermediates for further preparation of such amino acids. Some emphasis has been on the preparation of cyclic serine analogues. Major efforts have been on the preparation of cyclic alpha-quaternary bis(alpha-amino acid) derivatives as conformationally constrained dicarba-analogues of cystine.

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Rh(II)-carbenoid insertion into chiron substrates for stereoselective amino acid construction

Cited by 12 publications

References 21 publications

Dirhodium(II) Tetraacetate

Dirhodium(II) Tetraacetate

Dirhodium(II) Tetraacetate

The Schöllkopf chiron and transition metal mediated reactions, a powerful combination for stereoselective construction of cyclic α-quaternary-α-amino acid derivatives

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