Highly Efficient and Enantioselective Synthesis of Carbocyclic Nucleoside Analogs Using Selective Early Transition Metal Catalysis

Recent Advances in the Synthesis of the Carbocyclic Nucleosides as Potential Antiviral Agents

Compared with 4′-oxonucleosides, there have been far fewer systematic structure-activity relationship studies on carbocyclic nucleosides as antiviral and antitumour agents. This is mainly because of the synthetic problems in preparing the carbasugars. However, the recent discovery of the ring-closing metathesis (RCM) (a powerful tool for the preparation of 5-membered carbasugar via C-C bond formation) has made it possible to synthesize the key carbasugars to a preparative scale. This review summarizes the asymmetric syntheses of carbasugars and carbocyclic nucleosides, using an RCM reaction as a key step. Furthermore, the review includes valuable information for designing and synthesizing novel carbocyclic nucleosides.

Carbocyclic 3'-deoxyadenosine-based highly potent bisubstrate-analog inhibitor of basophilic protein kinases

Carbocyclic analogs of 3'-deoxyadenosine were synthesized as racemates and the resulting stereoisomers were separated by chromatography on a chiral column. The conjugation of obtained compounds with hexa-(D-arginine) via 6-aminohexanoic acid linker led to a highly potent inhibitor of several basophilic protein kinases with some selectivity towards cAMP-dependent protein kinase.

Enhanced catalase-like activity of manganese salen complexes in water: effect of a three-dimensionally fixed auxiliary

A new Mn(Salen) complex bearing an ureido group as an auxiliary that is three-dimensionally fixed by a cyclopentane ring fused to the Salen structure was developed. This compound exhibited considerably higher catalase-like activity than the original Mn(Salen), i.e., the cyclopentane-fused Mn(Salen) without the auxiliary, under near-physiological conditions.

The latest progress in the synthesis of carbocyclic nucleosides

This review presents the latest developments in the field of carba-nucleosides (1994-1998). Special attention is paid to the synthesis of key precursors to those carba-nucleosides that possess significant biological activities or have novel structures.