Reference

Palladium-catalyzed intramolecular a-arylation of aliphatic ketone, formyl, and nitro groups

Palladium-catalyzed intramolecular a-arylation of aliphatic ketone, formyl, and nitro groups. Muratake, Hideaki; Natsume, Mitsutaka; Nakai, Hiroshi (Research Foundation Itsuu Laboratory 2-28-10 Tamagawa, Setagaya-ku, Tokyo 158-0094, Japan). Tetrahedron, 60(51), 11783-11803 (English) 2004 Elsevier B.V. CODEN: TETRAB. ISSN: 0040-4020. DOCUMENT TYPE: Journal CA Section: 25 (Benzene, Its Derivatives, and Condensed Benzenoid Compounds) Intramol. arylation of properly designed substrates bearing a ketone, formyl, or nitro terminating group was achieved by use of a PdCl2(Ph3P)2-Cs2CO3 reaction system to form a variety of carbocyclic compds. Arylation in ketone compds. 823809-76-3 and 534-17-8 are cas registry numbers of chemicals which are used as reagents here. afforded benzene-annulated bridged or spirocycloalkanone derivs., depending on the structure of the cyclization precursors. Arylation in formyl compds. occurred at the a-position (a-arylation) or at the carbonyl carbon (carbonyl-arylation) depending on the structure of the cyclization precursors and on the reaction solvent. An a-arylated secondary nitro group was partially transformed to ketone in the manner of the Nef reaction, whereas a tertiary nitro group was partially eliminated to afford a styrene-type olefin. .

Reaction of gadolinium ion with alkali metal and ammonium carbonates

Reaction of gadolinium ion with alkali metal and ammonium carbonates. Mzareulishvili, N. V.Several substances are used for example 534-17-8 and 137888-62-1 which are their cas registry numbers. (Inst. Fiz. Org. Khim. im. Melikishvili, Tbilisi, USSR). Soobshch. Akad. Nauk Gruz. SSR, 137(2), 309-12 (Russian) 1990. CODEN: SAKNAH. ISSN: 0002-3167. DOCUMENT TYPE: Journal CA Section: 68 (Phase Equilibriums, Chemical Equilibriums, and Solutions) Section cross-reference(s): 79 Soly. and phase equil. were studied at 25° for the Gd(NO3)3-M2CO3 (M = Li, K, Cs, NH4+)-H2O systems. Equil. solid phases were characterized by chem. anal., TG, and IR spectroscopy. For M = Li, 1-step pptn. of Gd2(CO3)3.5H2O is obsd. and there is no further interaction of Li2CO3 with the solid phase (in contrast to the behavior of the 2CO3 and Cs2CO3 systems where formation of NaGd(CO3)2.6H2O or CsGd(CO3)2.5.5H2O is obsd.). Quant. pptn. of Gd is not obsd. in K2CO3 or (NH4)2CO3 solns. The phase equil. results can be used to develop methods for quant. sepn. of Gd from La and Ce by pptn. as carbonates. .