Topic
Reagent
About: Reagent is a research topic. Over the lifetime, 60091 publications have been published within this topic receiving 1234928 citations. The topic is also known as: reagens.
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TL;DR: In this paper, an efficient conversion of primary and secondary hydroxy-groups into iodo-groups, with inversion, in carbohydrates was described using either triphenylphosphine, iodine, and imidazole in toluene at elevated temperature.
Abstract: Efficient conversions of primary and secondary hydroxy-groups into iodo-groups, with inversion, in carbohydrates are described using either triphenylphosphine, iodine, and imidazole or triphenylphosphine and 2,4,5-tri-iodoimidazole in toluene at elevated temperature.
169 citations
TL;DR: In this paper, a new reagent, 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol, is described for the spectrophotometric determination of uranium(VI).
169 citations
TL;DR: A review of CAN in the construction of C-C bonds can be found in this paper, where it has been shown to mediate the facile oxidative addition of 1,3-dicarbonyl compounds to activated and unactivated alkenes leading to dihydrofurans and furanones.
Abstract: Organic synthesis using carbon centred radicals generated by one electron oxidants is of current interest. Although Mn(OAc)3 has received the most attention, it appears that cerium(IV) ammonium nitrate (CAN) would be a very useful reagent for the generation of radicals. The recent application of CAN in the construction of C–C bonds are highlighted in this review. CAN has been shown to mediate the facile oxidative addition of 1,3-dicarbonyl compounds to activated and unactivated alkenes leading to dihydrofurans and furanones. In most cases the reactions occur under milder conditions and the yields are superior when compared to Mn(OAc)3 mediated reactions. The results available thus far suggest that CAN offers cast potential in radical mediated organic synthesis.
169 citations
TL;DR: Benzyl trichloroacetimidate reacts with hydroxyl-groups under acid catalysis to give the corresponding benzyl etehrs in good yield; acid-labile protecting groups such as acetals are able to survive the reaction conditions.
Abstract: Benzyl trichloroacetimidate reacts with hydroxyl-groups under acid catalysis to give the corresponding benzyl etehrs in good yield; acid-labile protecting groups such as acetals are able to survive the reaction conditions.
169 citations
TL;DR: An effective method for repeatedly adding controlled quantities of reagents to droplets is described, suited to many multistep reactions, and is applied to a five-stage quantum dot synthesis wherein particle growth is sustained by repeatedly adding fresh feedstock.
Abstract: Droplet chemistry is less susceptible to channel-fouling than single-phase flow chemistry, but is largely limited to simple reactions where all reagents are preloaded into droplets. Here, the authors report a method for multistep chemistry in droplets, using two immiscible liquids and a gas to achieve controlled, sequential reagent addition.
169 citations