Novel Ring-Expansion Reaction between Formaldehyde Cyclic Acetal and Ethylene Oxide.

The reaction between histidine and formaldehyde.

Reaction of ethylene oxide with nicotinamide and nicotinic acid.

It has been shown that treatment of animal diets with ethylene oxide results in severe destruction of thiamine, niacin, pyridoxine, riboflavin, and folic acid (2, 3) and of the essential amino acids, histidine, methionine (4)) and lysine (5). Consequently, studies were undertaken to elucidate the nature of the reactions of ethylene oxide with the above nutrients. The realization that a tertiary...

Reaction of ethylene oxide with histidine, methionine, and cysteine.

Since it was shown (2) that the treatment of casein with ethylene oxide could diminish the biological availability of the histidine and methionine of this protein, it became of interest to determine whether other proteins were affected in the same way and to elucidate the nature of the chemical reactions involved. Particular interest in such reactions derives from the use of ethylene oxide as a...

Investigating the ring expansion reaction of pentaphenylborole and an azide.

The reaction between trimethylsilyl azide and pentaphenylborole was recently shown to produce the corresponding 1,2-azaborine. Investigating this transformation theoretically suggests that the reaction proceeds via coordination of the azide to the borole, rearrangement to a bicyclic species, and conversion to a kinetically favoured eight-membered BN3C4 heterocycle or expulsion of N2 to furnish ...

Cyclic ruthenium-alkylidene catalysts for ring-expansion metathesis polymerization.

A series of cyclic Ru-alkylidene catalysts have been prepared and evaluated for their efficiency in ring-expansion metathesis polymerization (REMP). The catalyst structures feature chelating tethers extending from one N-atom of an N-heterocyclic carbene (NHC) ligand to the Ru metal center. The catalyst design is modular in nature, which provided access to Ru complexes having varying tether leng...