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5 Polish Journal of Chemistry

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Application of Allyl Derivatives of Cholic Acid for the Synthesis of Macrocyclic Structures

100%

Czajkowska D. , Morzycki J.

Polish Journal of Chemistry

2006

tom Vol. 80, nr 4

663-666

Unusual Baeyer-Villiger Oxidation of 23-Oxosarsasapogenin Acetate

100%

Jastrzębska I. , Morzycki J.

Polish Journal of Chemistry

2005

tom Vol. 79 / nr 7

1245-1248

Synthesis of the Potent Antitumor Saponin OSW-1 Aglycone

100%

Morzycki J. , Gryszkiewicz A.

Polish Journal of Chemistry

2001

tom Vol. 75, nr 7

983-989

Asimple synthesis of the saponin OSW-1 aglycone is described.Akey step of the synthesis is the reaction of a recently reported steroidal 17_-hydroxy-22,16-lactone with isoamyllithium. The relative reactivity of the hydroxy groups in the 16_-, 17_-, and 22-positions was examined.

Reactions of Sapogenins with m-Chloroperoxybenzoic Acid Catalyzed by Lewis Acids

80%

Iglesias-Arteaga M. , Jastrzębska I. , Morzycki J.

Polish Journal of Chemistry

2006

tom Vol. 80, nr 4

667-671

Synthesis of 23-Oxa-22-deoxo Analogues of OSW-1 Aglycone

80%

Kruszewska A. , Wilczewska A. , Wojtkiewicz A. , Morzycki J.

Polish Journal of Chemistry

2006

tom Vol. 80, nr 4

611-615

Four ether analogues of OSW-1 aglycone were obtained by alkylation of a steroid alcohol with alkyl bromide. During theWilliamson reaction promoted by sodium hydride in addition to alkylation, an unusual dehydrogenation of secondary alcohol was observed.