The present meta-analysis confirms that cooled-tip and large-tip catheters are equally efficient for cavotricuspid isthmus ablation with both similar primary success rates and procedure parameters.
Various 2,3-dihydro-2-substituted-2-vinyl-1,4-benzodioxins 6 are obtained by alkylation of the methyl carbonate of 2,3-dihydro-1,4-benzodioxin-2-ylideneethanol 5 with various carbon nucleophiles in the presence of a palladium complex. Altough the yields in alkytion products are good in the case of a non-bulky nucleophile, formation of the diene 7 was generally observed when a bulky nucleophile was used.
Carbohydrates
Carbohydrates U 0500Palladium-Catalyzed Synthesis of Bis-glycosides of But-2-ene-1,4-diol, Butane-1,4-diol, and 1,2,-Bis (propenyl)benzene. -Spacer-linked disaccharides of type (VII), (VIII), (X), and (XI) (15 examples in all) are prepared, which are of interest due to the biological importance of carbohydrates mediating a host of biological responses. They also may serve as precursors for gemini surfactants or of carbohydrate-based macrocycles. -(SINOU*, D.; LHOSTE, P.; PICHON, N.; KRYCZKA, B.; PORWANSKI, S.; ZAWISZA, A.; J. Carbohydr. Chem. 21 (2002) 6, 545-558; Lab. Synth. Asymetrique, CNRS, Ec. Sci. Chim. Ind., Univ. Claude Bernard Lyon, F-69622 Villeurbanne, Fr.; Eng.) -M. Bohle 16-198
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