Acrylonitrile reacts with aryl iodides in the presence of tri-n-butylamine and a catalytic amount of a silica-bound arsine palladium(0) complex to afford stereoselectively (E)-cinnamo- nitriles in high yields.
A new approach modification reactions Atherton-Todd, Betty, Mannich and Doebner reactions with of arsine, stibine and bismuthine have been proposed in organometallic chemistry of these elements. These new reactions ca...A new approach modification reactions Atherton-Todd, Betty, Mannich and Doebner reactions with of arsine, stibine and bismuthine have been proposed in organometallic chemistry of these elements. These new reactions can be used for the synthesis of drugs and biologically active organic compound of arsenic, antimony and bismuth. A possible new mechanism of the reaction is proposed.展开更多
The reactions of the his (dimethylamino) alkylarsine with dids lead to the formations ofmacrocyclic arsinous acid esters. The synthesis of title compounds was described and theirslructures were characterized by elemen...The reactions of the his (dimethylamino) alkylarsine with dids lead to the formations ofmacrocyclic arsinous acid esters. The synthesis of title compounds was described and theirslructures were characterized by elemental analysis, IR, 1HNMR, and MS.展开更多
Japan has a limited amount of readily developable land.Sites are used and reused with alternating phases of excavation and deposition of man-made strata(MMS).The Great East Japan earthquake of 11th March 2011 caused w...Japan has a limited amount of readily developable land.Sites are used and reused with alternating phases of excavation and deposition of man-made strata(MMS).The Great East Japan earthquake of 11th March 2011 caused widespread damage due to ground waves and associated liquefaction-fluidization of MMS.A site at Kamisu City,Ibaraki Prefecture,was significantly affected.There,a gravel pit had been filled,partly excavated and then refilled.In 2003 it was found that a nearby drinking water well was seriously contaminated with arsenic.The site was sampled using a grid of boreholes and then excavated within a sheet pile enclosure at the source of the arsenic.The pollution came from large blocks that had been made by mixing cement with DiPhenylArsinic Acid powder and wastes that had been illegally dumped during refilling.The blocks were excavated and removed.Contaminated groundwater was pumped out and purified and the excavation was filled.展开更多
文摘Acrylonitrile reacts with aryl iodides in the presence of tri-n-butylamine and a catalytic amount of a silica-bound arsine palladium(0) complex to afford stereoselectively (E)-cinnamo- nitriles in high yields.
文摘A new approach modification reactions Atherton-Todd, Betty, Mannich and Doebner reactions with of arsine, stibine and bismuthine have been proposed in organometallic chemistry of these elements. These new reactions can be used for the synthesis of drugs and biologically active organic compound of arsenic, antimony and bismuth. A possible new mechanism of the reaction is proposed.
文摘The reactions of the his (dimethylamino) alkylarsine with dids lead to the formations ofmacrocyclic arsinous acid esters. The synthesis of title compounds was described and theirslructures were characterized by elemental analysis, IR, 1HNMR, and MS.
文摘Japan has a limited amount of readily developable land.Sites are used and reused with alternating phases of excavation and deposition of man-made strata(MMS).The Great East Japan earthquake of 11th March 2011 caused widespread damage due to ground waves and associated liquefaction-fluidization of MMS.A site at Kamisu City,Ibaraki Prefecture,was significantly affected.There,a gravel pit had been filled,partly excavated and then refilled.In 2003 it was found that a nearby drinking water well was seriously contaminated with arsenic.The site was sampled using a grid of boreholes and then excavated within a sheet pile enclosure at the source of the arsenic.The pollution came from large blocks that had been made by mixing cement with DiPhenylArsinic Acid powder and wastes that had been illegally dumped during refilling.The blocks were excavated and removed.Contaminated groundwater was pumped out and purified and the excavation was filled.
