摘要:
PAH is subjected to C—H/C—B coupling using a specific boron compound, a palladium compound, and o-chloranil to produce a compound in which a C—H bond of the PAH is directly arylated regioselectively in a simple manner. When the substrate and the boron compound are appropriately selected, a larger PAH can also be obtained by further performing an annulation reaction after the coupling reaction. Similarly, when PAH is subjected to C—H/C—H cross-coupling using a specific aromatic compound, a palladium compound, and o-chloranil, a compound in which a C—H bond of the PAH is directly arylated regioselectively can be produced in a simple manner. When the substrate and the aromatic compound are appropriately selected in this case, a larger PAH can also be obtained by further performing an annulation reaction after the cross-coupling reaction.
摘要:
PAH is subjected to C—H/C—B coupling using a specific boron compound, a palladium compound, and o-chloranil to produce a compound in which a C—H bond of the PAH is directly arylated regioselectively in a simple manner. When the substrate and the boron compound are appropriately selected, a larger PAH can also be obtained by further performing an annulation reaction after the coupling reaction. Similarly, when PAH is subjected to C—H/C—H cross-coupling using a specific aromatic compound, a palladium compound, and o-chloranil, a compound in which a C—H bond of the PAH is directly arylated regioselectively can be produced in a simple manner. When the substrate and the aromatic compound are appropriately selected in this case, a larger PAH can also be obtained by further performing an annulation reaction after the cross-coupling reaction.
摘要:
A power driven vessel is able to accommodate various types of power drive. The power driven vessel includes a vessel main body, power drive having an engine and a driving unit, an attachment member for mounting the power drive thereon, an insert recess portion formed within the rear portion of vessel main body, and a bottom plate disposed on the insert recess portion. The attachment member is movable between an upper position and a lower position in the vessel, and is directly placed on the bottom plate and inserted in the insert recess portion when the attachment member is held in the lower position.
摘要:
A method for determining air borne bacteria which includes successive steps of passing a volume of air by a timed suction pump through a membrane filter at a membrane passing velocity of not more than 15 cm/sec and under a constant transmembrane pressure of not more than 100 mmHg to collect the air borne bacteria on the surface of the membrane filter. The membrane filter has a multiplicity of minute holes and is provided on a medium-absorbing pad housed in a holder. A medium is injected into the medium-absorbing pad housed in said holder. The bacteria thus collected are incubated and the number of the colonies developed on the surface of said membrane filter is measured.
摘要:
An arrangement for restraining a hood of a vehicle body comprises a junction member attached to a corner portion of the vehicle body, where an end portion of a cowl panel extending along a lower end portion of a front windshield is coupled with a wheel apron member, for reinforcing the corner portion, and a hook member projecting from an inner surface of the hood which is provided for opening and closing an opening, such as creating an engine room, formed in the vehicle body in front of the cowl panel, so as to be positioned to face the junction member when the hood is positioned to close the opening. The hook member engages with the junction member in the case where the hood is moved toward a cabin space formed in the vehicle body behind the cowl panel.