Dibromophosphines, RPBr2, are obtained by reaction of tetrabromomethane with 7-substituted 7-phosphanorbornenes in toluene at ca. 100 degrees C. The phosphanorbornenes are obtained in situ by cycloaddition of N-phenylmaleimide with 1-substituted 3,4-di-methylphospholes. The overall reaction sequence shows a good compatibility with functional groups.
Phosphorus heterocycle synthesis by RPX2·AlX3 addition to [1,n]dienes VI
作者:A. Rudi、Y. Kashman
DOI:10.1016/0040-4020(81)85022-3
日期:1981.1
hydrogen and RP(O)X addition to the double bond. The phosphorylation is initiated by an unusual protonation process which employs the specific catalytic properties of the AlCl3·H2O complex (HX + RPX2 in the presence or absence of AlCl3 do not give any defined phosphorylation products but polymers). Some of the examined dienes give with water-doped RPX2·AlX3 phosphorylations and/or HX additions, involving in
Synthesis and infrared study of (C6H5)nPX3-nCr(CO)5 (X = Cl, Br, I, H; n = 0–3) and (C6H5)2 PRCr(CO)5 (R = Methyl, Ethyl, i-Propyl, t-Butyl) compounds
作者:E. Vincent、L. Verdonck、G.P. van Der Kelen
DOI:10.1016/0022-2860(80)85261-6
日期:1980.12
Abstract A method for the preparation of (C 6 H 5 ) n PX 3- n Cr(CO) 5 complexes in the crystalline state is described. The carbon-oxygen stretching vibration, v CO ( A , eq.), of the complexes with X = Cl, Br, I is mainly determined by the inductive effect of the (C 6 H 5 ) n PX 3- n group. For X = H, the v CO band is defined by the concomitant influence of the σ, π and steric effects.
摘要 描述了一种制备晶态(C 6 H 5 ) n PX 3-n Cr(CO) 5 配合物的方法。X = Cl, Br, I 的配合物的碳-氧伸缩振动 v CO ( A , eq.) 主要由 (C 6 H 5 ) n PX 3-n 基团的诱导效应决定。对于 X = H,v CO 带由 σ、π 和空间效应的伴随影响定义。
Substituted indoles, pharmaceutical compounds containing such indoles and their use as PPAR-gamma binding agents
申请人:——
公开号:US20030087902A1
公开(公告)日:2003-05-08
Disclosed are substituted indoles, pharmaceutical compositions containing such indoles, and their use in treating or preventing PPAR-&ggr; mediated diseases or conditions, such as osteopenia, osteoporosis, cancer, diabetes and atherosclerosis.
PHOSPHINE COMPOUND, PROCESS FOR PRODUCING THE SAME, AND PEROXIDE SCAVENGER USING THE SAME
申请人:Shioji Kosei
公开号:US20110015440A1
公开(公告)日:2011-01-20
The invention provides a novel peroxide scavenger comprising a phosphine compound represented by general formula [I]:
wherein Z
1
and Z
2
each represents a cyclic group; Ar represents an arylene group; R represents an aliphatic hydrocarbon group; Y represents phosphorus (P), nitrogen (N), or bismuth (Bi); and R
1
, R
2
, and R
3
each represents a cyclic group, particularly a peroxide scavenger that can scavenge peroxides such as reactive oxygen species which are generated in mitochondria upon exposure to oxidative stress and localized in mitochondria. The phosphine compound of the invention is oxidized by the peroxides localized in mitochondria to increase the fluorescence intensity, whereby the peroxides can be scavenged.
Several new 8-phosphabicyclo[3.2.1]oct-6-enes and -6-en-3-yl acetates were prepared by the alkyl (or aryl)dihalophosphane addition to cyclohepta -1,3-diene and 1-acetoxy cyclohepta-3,5-diene. The P-configuration in two P-epimer pairs (3, 4 and 5, 6) and three other compounds which were each obtained as a single isomer (1, 2 and 7) was determined by investigation of the NMR spectra, i.e. by complexation