Synthesis of medium and large ring heterocycles by photoinduced intermolecular and intramolecular electron transfer reactions of tetrachlorophthalimides with alkenes
摘要:
Photoinduced intermolecular and intramolecular electron transfer reactions of N-(omega -hydroxyalkyl)-tetrachlorophthalimide with alkenes led to the formation of medium to large sized heterocyclic rings. (C) 2000 Elsevier Science Ltd. All rights reserved.
Photoinduced regioselective arylation of N-vinyllactams and methylthiazoles by tetrachlorophthalimides
作者:Yong-Miao Shen、Guenter Grampp、Fei-Fei Tao、Ning-De He、Da-Qing Chen、Miao Ye
DOI:10.1016/j.jphotochem.2013.07.017
日期:2013.11
Photoinduced reactions of 4,5,6,7-tetrahalophthalimides (1a–1h) with selected N-vinyllactams (N-vinylpyrrolidinone, N-vinylcaprolactam) and methylthiazoles respectively lead to dehydrohalogenative coupling reactions between the phthalimide and these heterocycles. These mild and metal-free coupling reactions result in regioselective and stereoselective arylation of the heterocycles by the phthalimide
Intermolecular Photocyclizations of N-(ω-Hydroxyalkyl)tetrachlorophthalimide with Alkenes Leading to Medium- and Large-Ring Heterocycles-Reaction Modes and Regio- and Stereoselectivity of the 1,n-Biradicals
A new photocyclization strategy by using intermolecular tandem reactions between N‐(ω‐hydroxyalkyl)‐4,5,6,7‐tetrachlorophthalimides (1, 2, and 3) and a series of acyclic and cyclic alkenes is reported. Electron transfer of the triplet‐excited phthalimide with the alkene and regioselective trapping of the alkene cation radical by the hydroxyl group at the phthalimide side chain gives a triplet 1,n‐biradical
Allen; Nicholls, Journal of the American Chemical Society, 1934, vol. 56, p. 1410
作者:Allen、Nicholls
DOI:——
日期:——
[EN] AMINOHYDROCARBON PHOSPHONATE OLIGONUCLEOTIDES AND USES THEREFOR<br/>[FR] OLIGONUCLEOTIDES CONTENANT UNE FRACTION PHOSPHONATE D'AMINOHYDROCARBURE ET UTILISATION DESDITS OLIGONUCLEOTIDES
申请人:PHARMGENICS, INC.
公开号:WO1995031572A1
公开(公告)日:1995-11-23
(EN) A method for modulating the activity of a protein or nucleic acid $i(in vivo) by binding it with an oligonucleotide wherein at least one nucleotide unit includes an aminohydrocarbon phosphonate moiety having formula (I), wherein X is (II), and wherein R1 is a hydrocarbon, preferably alkylene, and R2, R3 and R4 are each independently hydrogen or a hydrocarbon. Preferably, R1 is methyl, ethyl or propyl moiety. It is also preferred to use the pure stereoisomers of such compounds rather than their racemic mixtures. Such pure stereoisomers having improved binding capabilities and improved resistance to nucleases. Alternatively, X may be (III), wherein R1, R2, and R3 are as hereinabove described, and R5 is a detectable marker, thus making such oligonucleotides useful as diagnostic probes or for screening libraries of cells.(FR) Procédé de modulation de l'activité d'une protéine ou d'un acide nucléique $i(in) $i(vivo) consistant à lier ladite protéine ou ledit acide nucléique avec un oligonucléotide, dans lequel au moins une unité oligonucléotidique comprend une fraction phosphonate d'aminohydrocarbure de formule (I) dans laquelle X est (II), dans laquelle R1 est un hydrocarbure, de préférence alkylène, et R2, R3 et R4 sont chacun indépendamment hydrogène ou un hydrocarbure. De préférence R1 est une fraction méthyle, éthyle ou propyle. Il est également préférable d'utiliser les stéréoisomères purs desdits composés plutôt que leurs mélanges racémiques, lesdits stéréoisomères purs ayant des capacités de liaison améliorées et une résistance améliorée aux nucléases. Alternativement, X peut être (III), dans laquelle R1, R2 et R3 sont tels que décrits ci-dessus, et R5 est un marqueur détectable, ce qui rend lesdits nucléotides utiles en tant que sondes diagnostiques et pour cribler des bibliothèques de cellules.