106800-18-4Relevant academic research and scientific papers
Metal or ammonium alginates as Lewis base catalysts for the 1,2-addition of silyl nucleophiles to carbonyl compounds
Verrier, Cécile,Oudeyer, Sylvain,Dez, Isabelle,Levacher, Vincent
supporting information; experimental part, p. 1958 - 1960 (2012/05/19)
Several metal (Na+, Ca2+) or ammonium (n-Bu 4N+) derivatives of alginic acid, an abundant bio-polymer obtained from the cell walls of brown algae, were synthesized. Their potential to act as organocatalysts to catalyze the 1,2-addition of various silyl derivatives to carbonyl compounds was evaluated for the first time. Ammonium alginate 1h is able to promote the reaction in modest to good isolated yields (up to 98%) affording access to a large range of substrates (β-cyano alcohols or ester, β-substituted methylacrylate or acrylonitrile, and cyanohydrin) by using only 5 mol % of catalyst.
Hydroxyl-Directed Regioselective Monodemethylation of Polymethoxyarenes
Lal, Kasturi,Ghosh, Subrata,Salomon, Robert G.
, p. 1072 - 1078 (2007/10/02)
Methoxyl groups ortho to β-hydroxyethyl or γ-hydroxypropyl substituents in polymethoxybenzene derivatives were regioselectively demethylated with sodium thioethoxide in N,N-dimethylformamide.Methoxydihydrobenzofurans or methoxychromans were produced by cyclization of the monodemethylated β-hydroxyethyl or γ-hydroxypropyl derivatives, respectively.
