N,N-Dimethylformamide-Mediated Sodium Reduction of trans-3,3‘-Benzo[c]thienylidene-1,1‘-dithione and trans-3,3‘-Benzo[c]selenonylidene-1,1‘-dithione
摘要:
The synthesis of stable methylthio-capped biisothianaphthene and biisoselenophene derivatives has been achieved using DMF-mediated sodium reduction of cyclic thiocarbonyl compounds.
Synthesis and antiproliferative activity of novel selenoester derivatives
作者:Enrique Domínguez-Álvarez、Daniel Plano、María Font、Alfonso Calvo、Celia Prior、Claus Jacob、Juan Antonio Palop、Carmen Sanmartín
DOI:10.1016/j.ejmech.2013.11.034
日期:2014.2
A series of 31 new selenoesters were synthesized and their cytotoxic activity was evaluated against a prostate cancer cell line (PC-3). The most active compounds were also tested against three tumoural cell lines (MCF-7, A-549 and HT-29) and one non-tumour prostate cell line (RWPE-1). Thirteen compounds showed significant activity towards all tumour cells investigated, and some of them were even more
The reaction of primary selenoamides with bisacyl chlorides in the presence of Et3N was investigated. By the reaction with malonyl chloride, 6-hydroxy-1,3-selenazin-4-ones were provided in high yield. By the reactions with succinyl chloride, glutaryl chloride, and phthaloyl chloride, the corresponding selenoanhydrides were obtained in moderate yields, respectively.
Various diacyl selenides, diacyl diselenides and selenocarboxylates were synthesized by reaction of several acyl chlorides with LiAlHSeH. Reaction of diacyl chloride with LiAlHSeH afforded cyclic selenoanhydrides. In the 77Se NMR spectra, we found that the chemical shifts of the diacyl selenides and the diacyl diselenides could facilitate their distinction.
Reaction of acylchlorides with phenylselenotrimethylsilane promoted by TBAF afforded a mildgeneral access to selenolesters in good yields. When acylchlorides were reacted with bis(trimethylsilyl)selenide (HMDSS) in 2:1 or 1:1 ratio a selective entry to selenoanhydrides or diacyl diselenides respectively was obtained.
5-ethylenedithio-1,3-dithiol-2-ylidene)-1,3-dihydrobenzo[c]selenophene (BEDT-BDTBS) has been synthesized by a convenient method and the electric properties and X-ray crystal structures of its single-crystalline cationradicalsalts have been clarified.