The catalysed intermolecular hydroamination of a series of terminal alkynes with substituted hydrazines was achieved using Rh(I) and Ir(I) complexes.

Inhibitions of the relatively highly purified flavoenzyme, bovine kidney mitochondrial monoamine oxidase, previously described in Paper I (Erwin, V. G., and Hellerman, L., J. Biol. Gem., 242, 4230 (1967)), by several agents of current interest have been investigated. The inhibitors include Nmethyl-N-(Z-propynyl)benzylamine (pargyline), (+)-fransphenylcyclopropylamine (d form of tranylcypromine)...

2,3-dihydro-1H-pyrazoles were highly selectively synthesized via the Pd(0)-catalyzed coupling-cyclization reaction of 4-non-substituted 2-substituted 2,3-allenyl hydrazines with aryl iodides in moderate to good yields.

Nonenzymatic glycation of proteins has been implicated in various diabetic complications and age-related disorders. Proteins undergo glycation at the N-terminus or at the epsilon-amino group of lysine residues. Glycation of proteins proceeds through the stages of Schiff base formation, conversion to ketoamine product and advanced glycation end products. Gramicidin S, which has two ornithine res...

The reactions between o-hydroxylphenyl-functionalized enaminones and sulfonyl hydrazines providing 3-sulfenylated chromones via domino chromone ring construction and C(sp2)-H bond sulfenylation have been achieved under transition-metal-free conditions by using KIO3 as the only catalyst.

Aryl N-aminosulfonamides could be easily produced via a palladium-catalyzed coupling of aryl halides, potassium metabisulfite, and hydrazines. Potassium metabisulfite is an excellent equivalent of sulfur dioxide in the reaction of palladium-catalyzed aminosulfonylation.

A diastereoselective synthesis of cyclic hydrazines was achieved from a carbocyclisation of allene-hydrazones by the Pd-catalyzed distannylation of an allene moiety, followed by the transmetallation of allylic stannane intermediates with TiCl4.

The indole unit is one of the most abundant and relevant heterocycles in natural products and pharmaceuticals. The synthesis of indoles has been a topic of research for over 100 years, and a variety of well-established classical methods are now available. The venerable Fischer indole synthesis, discovered in 1883, remains one of the most powerful and versatile routes to the indole heterocycle, ...

The various synthetic substituted hydrazines, which cause tumors in animals, are briefly enumerated. To date, 19 of them have proved to be tumorigenic in animals. A number of these chemicals are found today in the environment, in industry, in agriculture, and in medicine, and the human population is exposed to a certain degree to some of them. Hydrazine also occurs in nature in tobacco and toba...