acetylenic

This is found to be most prominent in a broad range of sulfur or acetylenic compounds.

An overall increase of triglycerides (common plus acetylenic) was found only at low temperature (1 and 6 °C).

It is also effective for the stereoselective reduction of certain acetylenic ketones.

These compounds form adducts of varying stability with acetylenic reagents.

Tazarotene is a member of the acetylenic class of retinoids.

Acetylenic and allenic substrates react to give products with some retained unsaturation.

The acetylenic bond distances are normal.

Key words: nucleophilic addition to acetylenic esters.

The order of the triple bond has been partially reduced and there is an important distortion of the acetylenic molecule.

Together with 2-butyne and diphenylacetylene, it serves as a reference acetylenic ligand in organometallic chemistry.

Acetylenic substrates undergo the reaction; however the scope of this reaction is limited and yields are often low.

Internal alkynes feature carbon substituents on each acetylenic carbon.

The acidic hydrolysis of those phosphoramides leads to unsymmetrical acetylenic diamines 4.

Treatment of 2a(E) with lead tetraacetate/acetonitrile and deprotection afforded acetylenic derivative 3b.

Good yields of acetylenic aldehydes and ketones are obtained for those cases in which the epoxide is ring fused.

Acetylenic acids are isomerized by alkali metal amides of 1,3-diaminopropane to 3,5-dienoic acids.

Acetylenic fatty acids may act as enzyme inhibitors in fatty acid metabolism.

Another technique that appears that might be useful, at least with isolated acetylenic triple bonds consists in mercuration-demercuration.

Prior to our work, alkyne migration in carbenes was unprecedented, and this method represents a major synthetic advance for modern acetylenic chemistry.

The corresponding acetylenic alcohols are also suitable substrates, although the resulting propargylic aldehydes can be quite reactive.

In the Favorskii-Babayan synthesis ketones and acetylenic compounds react in presence of alkali.

Possible ene components include olefinic, acetylenic, allenic, aromatic, cyclopropyl, and carbon-hetero bonds.

The coordination around the platinum atom is square planar and the acetylenic ligand is perpendicular to the Pt plane.

Tariric acid is an acetylenic fatty acid that can be found in the tallow-wood tree, Ximenia americana.

In this way the acetylenic protons are located in the cone-shaped shielding zone hence the upfield shift.