Synthesis of D-glucose-based azacrown ethers with phosphinoxidoalkyl side chains and their application to an enantioselective reaction was written by Novak, Tibor;Bako, Peter;Keglevich, Gyorgy;Dobo, Andras;Vekey, Karoly;Toke, Laszlo. And the article was included in Journal of Inclusion Phenomena and Macrocyclic Chemistry in 2001.Recommanded Product: 954-81-4 This article mentions the following:
Five chiral α-D-glucose-based monoaza-15-crown-5 ethers with phosphinoxidoalkyl side chains of one to five carbon atoms I (n = 1-5) have been synthesized. The cation binding ability of the new lariat ethers was evaluated by the picrate extraction method. The substituents at the nitrogen atom were not a major influence on the cation extraction ability of the azacrown ether; the compounds showed, however, a significant asym. induction as phase transfer catalysts in the Michael addition of 2-nitropropane to chalcone (95% ee). In the experiment, the researchers used many compounds, for example, N-(5-Bromopentyl)phthalimide (cas: 954-81-4Recommanded Product: 954-81-4).
N-(5-Bromopentyl)phthalimide (cas: 954-81-4) belongs to organobromine compounds. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents. Bromine-containing agents predominate because not only are they more efficient than similar chlorine-containing species, but also the high atomic weight of bromine ensures that it is present in a high mass fraction within most organobromine compounds.Recommanded Product: 954-81-4
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary