ELEMENTAL SULFUR-CATALYZED SYNTHESIS OFN,N′-DISUBSTITUTED 1,3-DIIMINOISOINDOLINES FROM PHTHALONITRILE WITH AMMONIA AND AMINES

Synthesis of α,α-disubstituted aryl amines by rhodium-catalyzed amination of tertiary allylic trichloroacetimidates.

The rhodium-catalyzed regioselective amination of tertiary allylic trichloroacetimidates with unactivated aromatic amines is a direct and efficient approach to the preparation of α,α-disubstituted allylic aryl amines in good yield and with excellent regioselectivity. This method is applicable to a variety of unactivated primary and secondary amines and allows for the preparation of reverse pren...

Rhodium-Catalyzed Synthesis of 2,3-Disubstituted Indoles from β,β-Disubstituted Stryryl Azides**

Synthesis of Cystine I N Wool from Elemental Sulfur and Sulfate Sulfur

T HE data in the literature do not clearly indicate the value of inorganic sulfur supplements in ruminant rations. Recently Garrigus et al. (1950) obtained data using a low-sulfur, semipurified ration which suggested that elemental sulfur could be utilized by sheep as measured by weight gains and wool growth. Block and Stekol (1950) showed that when NaoS~504 was administered orally to a cow the...

Synthesis and Characterization of a Novel Nanoporous Composite Based on Elemental Sulfur and Graphitic Mesoporous Carbon

A novel sulfur nanocomposite was fabricated based on graphitic mesoporous carbon.The graphitic mesoporous carbon was synthesized using sucrose as carbon precursor, nano CaCO3 as a hard template and nickel nitrate as graphitization catalyst. The structural properties of the prepared material were characterized using powder X-Ray Diffraction (XRD), N2-adsorption/de...

Synthesis of mono- and 1,3-disubstituted allenes from propargylic amines via palladium-catalysed hydride-transfer reaction.

Mono- and 1,3-disubstituted allenes were synthesized from the corresponding propargylamines via palladium-catalysed hydride-transfer reaction. In the current transformation, propargylic amines can be handled as allenyl anion equivalents and introduced into various electrophiles to be transformed into allenes under palladium-catalyzed conditions.