Showing papers on "Brucine published in 1983"
TL;DR: In this paper, the oxidation of the alkaloid brucine by chromium(VI) in sulfuric acid medium in the presence and absence of oxalic acid is described.
14 citations
TL;DR: In this paper, a solution of a cyanohydrin and brucine in methanol was kept at room temperature, and one optically active isomer of the cyanhydrin was obtained as Brucine complex in a yield of more than 50%.
Abstract: When a solution of a cyanohydrin and brucine in methanol was kept at room temperature, one optically active isomer of the cyanohydrin was obtained as brucine complex in a yield of more than 50%.
13 citations
TL;DR: In this article, the same method was used to resolve α,β-dichloroacetylenic alcohols (8,9) which have three chiral carbons at the 1,2,3-positions.
Abstract: Optical resolution of α- (2,3) and β-haloacetylenic alcohols (13,14) which have two chiral carbons at the 1,2- and 1,3-positions, respectively, was performed efficiently by complexation with brucine. By the same method, α,β-dichloroacetylenic alcohols (8,9) which have three chiral carbons at the 1,2,3-positions were also resolved.
5 citations
TL;DR: In this article, the IR spectrum of Brucine with the spectra of the complexes implies that the transition metals prefer to form complexes with oxygen, except (partially) for nickel, or with the π-electron cloud of the double bond in the case of palladium.
2 citations
TL;DR: In this article, the same method was used to resolve α,β-dichloroacetylenic alcohols (8,9) which have three chiral carbons at the 1,2,3-positions.
Abstract: Optical resolution of α- (2,3) and β-haloacetylenic alcohols (13,14) which have two chiral carbons at the 1,2- and 1,3-positions, respectively, was performed efficiently by complexation with brucine. By the same method, α,β-dichloroacetylenic alcohols (8,9) which have three chiral carbons at the 1,2,3-positions were also resolved.
TL;DR: In this article, a solution of a cyanohydrin and brucine in methanol was kept at room temperature, and one optically active isomer of the cyanhydrin was obtained as Brucine complex in a yield of more than 50%.
Abstract: When a solution of a cyanohydrin and brucine in methanol was kept at room temperature, one optically active isomer of the cyanohydrin was obtained as brucine complex in a yield of more than 50%.