Advances in the field of phosphorus chemistry are documented, by revealing the synthetic utility of previously underutilized quaternary phosphiranium salts (QPrS) as three‐chain‐atom electrophilic building blocks. Notably, control of their challenging C‐centered electrophilicity is disclosed with an expedient synthesis of tertiary β‐anilino phosphines as a proof‐of‐concept.
We report the preparation of phosphiranium salts by quaternarization of phosphiranes, a class of sensitive, highlystrained, and poorly nucleophilic cyclic phosphines. High-yielding introduction of a varied set of alkyl groups including methylene ester arms was accomplished under mild conditions. A Cu-catalyzed electrophilic arylation of phosphiranes using diaryl iodonium reagents was also achieved
我们报告了通过 phosphiranes 季铵化制备 phosphiranium 盐,这是一类敏感的、高度紧张的、亲核性差的环膦。在温和条件下实现了包括亚甲基酯臂在内的一系列不同烷基的高产率引入。还实现了使用二芳基碘鎓试剂对磷烷进行 Cu 催化的亲电芳基化,以产生前所未有的 P,P-二芳基磷鎓盐,并具有良好的效率。
Synthesis and properties of new luminescent 10-carboxymethylacridinium derivatives
作者:Naofumi Sato
DOI:10.1016/0040-4039(96)01980-6
日期:1996.11
Alkylation of the N-10 on the acridine ring proceeds using the trifluoromethanesulfonic acid ester under mild conditions. Deprotection of the benzyl ester using acid thus enables simple, high-yield synthesis for acridinium compounds with a binding functional group at N-10.
Acridinium Salt Based Fluorescent and Colorimetric Chemosensor for the Detection of Cyanide in Water
作者:Young-Keun Yang、Jinsung Tae
DOI:10.1021/ol062323r
日期:2006.12.1
salt used in this sensor system is prepared in a single step from an acridine orange base. Detection is based on the irreversible, 1:1 stoichiometric, nucleophilic addition of cyanide to the 9-position of the acridinium ion. This process induces a large decrease in fluorescence intensity and a marked color change. The selectivity of the system in aqueous media for CN- over other anions is remarkably high
The present invention provides a method for industrially producing an optically active lysine derivative useful as a pharmaceutical intermediate. More particularly, the present invention provides a production method including protecting an amino group or an amino group and carboxyl group of optically active 2-amino-6-methyl-6-nitroheptanoic acid with a protecting group, reducing a nitro group to synthesize a 6,6-dimethyl lysine derivative and reacting the 6,6-dimethyl lysine derivative with an acetic acid derivative.