+)-j-Citronellene, the main component of the %ecbnical grade pyrolysate of (+)-cis-pinane, can be chemoselectively processed to certain C10 derivatives in the presence of isomeric Clo olefins. These derivatives are converted into mono-and bifunctional chiral building blocks suitable for the incorporation of4deCH.Y fragments with 8-or &con-figuration into aliphatic chains. Although their optical purity may be as low as 50%, that o f the end prQducts can be upgraded by inclusion of an optical resolution step in the synthetic sequence.

No abstract

In this paper, we introduce a method for reasoning with words based on hedge algebra using linguistic cognitive map (LCM). Our model consists of a set of vertices and edges whose values are linguistic variables that are constrained by a linguistic lattice.The algorithm for the system studied consists of fuzzification, reasoning, and defuzzification. Further, the total effect between any two vertices in the LCM is computed.

Nowadays, with the demand to reflect the real world, we have a number of imprecise stored business data warehouses. The precise data classification cannot solve all the requirements. Thus, the fuzzy decision tree classification problem is important for the fuzzy data mining problem. The fuzzy decision classification based on the fuzzy set theory has some limitations derived from its innerself. The hedge algebra with many advantages has become a really useful tool for solving the fuzzy decision tree classification. However, the sample data homogenising process based on the quantitative methods of the hedge algebra still has some restrictions because of errors evolved and the resulting tree is not truly flexible. So, the fuzzy decision tree obtained is not always highly predictable. In this paper, using fuzziness intervals matching with hedge algebra, the authors proposed an inductive learning method "HAC4.5 fuzzy decision tree" to obtain a fuzzy decision tree with high predictability.

ChemInform Abstract Palladium-catalyzed cross condensation of the alkenylboronic acid (I) with the unsaturated bromo compounds (II) yields the dienes (III) with retention of the configuration at both double bonds of the educts.