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[reaction--see text] An efficient Grignard- and organolithium-induced regio- and chemoselective anionic acylation is reported. A number of tricyclic ketones are prepared in good to excellent yields via this method. This method is complementary to the Frieldel-Crafts acylation for electron-deficient substrates. A novel anisole-based Grignard reagent was developed to effect the cyclization of sterically hindered substrates. This novel reagent has been successfully applied to the synthesis of Sch 66336, a candidate for oncologic treatment.

Charles Bernard. Découvrir la Corse ou interpeller la République ?. In: Autres Temps. Cahiers d'éthique sociale et politique. N°65, 2000. pp. 80-92.

Resume Soient E′ et E″ deux espaces vectoriels complexes de dimension finie. Etant donne les operateurs lineaires A′ sur E″ et A″ sur E″ sous leurs formes de Jordan respectives, nous montrons que l'etude de la forme de Jordan des operateurs A sur E′ ⋯ E″ dont les matrices sont de la forme A= A′ B O A″ avec B un operateur lineaire de E″ dans E′ peut-etre abordee a partir de la description des sous-espaces reduisants minimaux contenant un sous-espace donne. Comme application, nous donnons une nouvelle methode pour la determination explicite de la forme de Jordan de A dans le cas ou A″ est cyclique.

Two methods for the stereospecific synthesis of the title compound are described. These short and efficient syntheses provide rapid access to this key intermediate in the construction of 2′-Deoxy Carbocyclic Nucleosides.

Charles Bernard. Rétrospective et prospective, 1993-1995. In: Autres Temps. Cahiers d'éthique sociale et politique. N°43, 1994. pp. 111-115.

Resume Soit A un operateur algebrique p -primaire sur un espace vectoriel E. Nous donnons une description complete de l'algebre des operateurs qui laissent invariants les sous-espaces invariants pour A et nous etudions le comportement de la reflexivite algebrique par extension du corps de base.

[reaction--see text] An efficient Grignard- and organolithium-induced regio- and chemoselective anionic acylation is reported. A number of tricyclic ketones are prepared in good to excellent yields via this method. This method is complementary to the Frieldel-Crafts acylation for electron-deficient substrates. A novel anisole-based Grignard reagent was developed to effect the cyclization of sterically hindered substrates. This novel reagent has been successfully applied to the synthesis of Sch 66336, a candidate for oncologic treatment.

Motived by an intrinisic necessary condition for the purifiability of subgroups of primary abelian groups due to K. Benabdallah and T. Okuyama we introduce new functors on the category of pairs (G, A),where A is a subgroup of G,to the category of Z/pZ-vector spaces. The vanishing of these functors leads to the notion of vertical subgroup which is a weakening of purity but also an essential component of the latter. In fact, a vertical subgroup is pure if and only if it is neat. We establish various facts about vertical subgroups and “maximal” vertical subgroups and apply the resulting theory to the problem of purifiability. We show that the class of quasi-complete groups is precisely the class of reduced groups in which every subgroup satisfying the intrinsic necessary condition for purifiability is in fact purifiable. This is also the class of reduced p-groups in which the maximal vertical subgroups are precisely the pure subgroups.

Resume Soit A un operateur nilpotent sur un espace de Banach E . Nous demontrons que l'orbite de E par l'action du commutant de A contient les F ϵ Lat A qui sont de dimension finie.

Surface Tilt Mapping (STM) has been successfully applied to stimulation treatments, disposal projects and in numerous steam floods to provide information on fluid movements in the reservoir. This proven technology has now been applied to a waterflood in the San Andres formation at a depth of 5600 feet to analyze preferential flow. Since typical water injection rates in the San Andres range from 100 to 300 BWPD, a novel flowback method was developed to maximize the STM response when testing injection wells under normal operating conditions. An analysis technique that allows the removal of earth tides was also applied to further enhance the quality of the data. The STM results showed conclusive preferential flow direction in the seven wells tested. In most wells, multiple tests were performed with good agreement on the flow trend.

A novel enantioselective alkylation of double benzylic substrates with secondary electrophiles is reported. A simple norephedrine-based chiral ligand was synthesized that gives alkylation product in 95% yield and 95% ee. A unique water effect on the enantioselectivity was unveiled. Good to excellent ee values were obtained with a number of double benzylic substrates and secondary electrophiles. This novel reaction has been applied to the synthesis of a promising anticancer agent.

Charles Bernard. La mémoire vivante. Des témoins du siècle à venir. In: Autres Temps. Les cahiers du christianisme social. N°37, 1993. pp. 95-97.

Du militantisme communiste au ministère pastoral, Bernard Charles retrace la trajectoire politique d'une vie, entre 1925 et l'an 2000. Une esquisse de mémoire en quête de l'articulation entre démarche spirituelle et engagement social., Charles Bernard. Démarche spirituelle et engagement social. In: Autres Temps. Cahiers d'éthique sociale et politique. N°68, 2000. pp. 29-37.

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