Luminescent assays for ketones and aldehydes employing catalytic signal amplification
作者:Ronald J. T. Houk、Eric V. Anslyn
DOI:10.1039/b616765a
日期:——
Herein we report the first use of transition metal catalytic signal enhancement for the analysis of small organic analytes. Two assays using Sonogashira and Suzuki cross-couplings have been used in the detection of ketones and aldehydes produce highly luminescent markers. The latter analysis utilizing the Suzuki coupling demonstrates the first use of peroxyoxalate initiated chemiluminescence in a sensing application. Chemiluminescent measurement revealed much higher sensitivity than fluorescence.
Simple and efficient deprotection of 1,3-dithianes and 1,3-dithiolanes by copper(II) salts under solvent-free conditions
作者:Gabriela Oksdath-Mansilla、Alicia B. Peñéñory
DOI:10.1016/j.tetlet.2007.06.160
日期:2007.8
Aerobic solid state deprotection of 1,3-dithianes and 1,3-dithiolanes of aromatic and aliphatic aldehydes and ketones has been performed in excellent yields by Cu(NO3)2·2.5H2O in the presence of montmorillonite K10 clay and sonic waves at room temperature. These dethioacetalizations proceed more slowly but efficientlyunder catalytic conditions by using 20% of the copper(II) salt with K10 clay and
prepare dithioacetals, with excellent yields, via the condensation of 1,3-propanedithiol, benzyl, and n-butyl mercapthanes with several carbonylic compounds using a bentonitic earth as the catalyst is proposed. Also, the acidic role of the clay in the reaction is discussed. The product structures were established by 1H and 13C NMR, as well as by the corresponding EIMS and HRMS data. To the memory of
ISOTHIOCYNATES AND GLUCOSINOLATE COMPOUNDS AND ANTI-TUMOR COMPOSITIONS CONTAINING SAME
申请人:Rajski Scott R.
公开号:US20130116203A1
公开(公告)日:2013-05-09
The present invention provides glucosinolate and isothiocyanate compounds and related methods for synthesizing these compounds and analogs. In certain embodiments, these glucosinolate and isothiocyanate compounds are useful and chemopreventive and or chemotherapeutic agents.
A Facile Mild Deprotection Protocol for 1,3-Dithianes and 1,3-Dithiolanes with 30% Hydrogen Peroxide and Iodine Catalyst in Aqueous Micellar System
作者:Nemai Ganguly、Sujoy Barik
DOI:10.1055/s-0028-1088023
日期:2009.4
A simple clean expeditious protocol for the deprotection of 1,3-dithianes and 1,3-dithiolanes has been developed using 30% aqueous hydrogen peroxide activated by iodine catalyst (5 mol%) in water in the presence of sodium dodecyl sulfate (SDS) under essentially neutral conditions. The method showed tolerance for a number of phenol protecting groups such as allyl, benzyl, TBDMS, TBDPS ethers, phenolic