No abstract

Copper-catalyzed aerobic oxidative sulfuration and annulation of propargylamines with elemental sulfur is described. The tandem reaction involves C–N bond cleavage and the formation of multiple C–S bonds, affording 1,2-dithiole-3-thiones in good to excellent yields with good functional group tolerance.

The phase equilibria at 340°C of the Al – Ni – Zn system were investigated by combining the diffusion couple technique with the equilibrated alloys method. The samples were examined by means of optical microscopy, X-ray diffraction, scanning electron microscopy, and electron probe microanalysis. Two ternary compounds (1 and 2) were found to exist at 340°C. The solubilities of Zn in AlNi, Al3Ni2 and Al3Ni were determined to be about 20, 2 and 1 at.% Zn, respectively. The solubilities of Al in β1-NiZn and in were measured to be about 11.5 and 1 at.% Al, respectively. The solubilities of Zn in both AlNi3 and Al3Ni5 are below 1 at.% Zn.

An efficient synthesis of aryl propanethioamides by a three-component reaction of arylpropynes, elemental sulfur and formamides has been developed. The cascade thioami-dation proceeds smoothly through the hydrolysis of the CÀ C triple bond and formamides, the formation of CÀ N bond and CÀ S double bond in one-pot reaction.

Equilibria E 4000 Experimental Investigation of the Al-Y Phase Diagram -[revised phase diagram]. -(LIU, S.; DU*, Y.; XU, H.; HE, C.; SCHUSTER, J. C.; J. Alloys Compd.