Rapid, green disulphide bond formation in water using the corrin dicyanocobinamide.

Peptide chemists seek rapid methods combined with facile purification when producing disulphide bonds post solid-phase synthesis. Current methods typically require long reaction times of up to two days, can result in side-products from over-oxidation and/or degradation, require organic solvents, and/or require challenging purification. Herein, we describe a rapid, green, and facile oxidation of a series of peptides with up to three disulphide bonds. The method was conducted in aqueous solution, in air, utilizing the biocompatible corrin ring-containing compound dicyanocobinamide, and offers reaction times under 1 hour with simple one step removal of the catalyst.

Investigations of the Copper Bromide-2,2'-Dipyridyl System: Hydrothermal Synthesis and Structural Characterization of Molecular Cu(3)Br(4)(C(10)H(8)N(2))(2), One-Dimensional CuBr(2)(C(10)H(8)N(2)), and Two-Dimensional [Cu(2)(OH)(2)(C(10)H(8)N(2))(2)][Cu(4)Br(6)].

The hydrothermal reactions of CuBr(2), CuBr, and 2,2'-dipyridyl have resulted in the synthesis of three new compounds. Cu(3)Br(4)(C(10)H(8)N(2))(2) (1) is a molecular phase; CuBr(2)(C(10)H(8)N(2)) (2) is a one-dimensional chain structure; and [Cu(2)(OH)(2)(C(10)H(8)N(2))(2)][Cu(4)Br(6)] (3) crystallizes in a two-dimensional sheet structure. All three compounds were characterized by single-crystal X-ray diffraction. Crystal data for 1, triclinic, space group P&onemacr; (No. 2) with a = 10.604(2) Å, b = 11.642(2) Å, c = 11.688(2) Å, alpha = 61.965(5) degrees, beta = 68.965(5) degrees, gamma = 69.523(5) degrees, Z = 2; 2, monoclinic, space group C2/c (No. 15) with a = 16.766(4) Å, b = 9.287(2) Å, c = 7.392(2) Å, beta = 110.536(6) degrees, Z = 4; 3, monoclinic, space group P2(1)/n (No. 14) with a = 10.907(3) Å, b = 6.0677(13) Å, c = 21.620(5) Å, beta = 90.542(4) degrees, Z = 4.