Glaser oxidation

Glaser oxidative coupling, 46, 41 Glucqfvranosyl chloride, 2 ACET AMIDO 2 DEOXY TRIACETATE,... 

Glaser oxidative coupling, 45, 41 Glucopyranosyl chloride, 2-acet-AMIDO-2-DEOXY-, TRIACETATE, a-D-, 46, 1... 

The reaction, Glaser oxidative coupling, is a general one, but this particular technique is recommended for the more water-... 

Oxidative coupling of a terminal alkyne is a particularly easily performed carbon-carbon bond forming reaction, which results in a good yield of the symmetrical diacetylene. A widely used procedure involves the oxidation of the alkyne with air or oxygen in aqueous ammonium chloride in the presence of a copper(i) chloride catalyst (Glaser oxidative coupling). 

Glaser oxidative coupling [Cu(OAc)2/py] of the rhenium ethynyls Re(C=CH)(NO)(PR3)Cp (R = Ph 248-250 tol, C6H4Bu -4251) affords the corresponding diyndiyls Re(NO)(PR3)Cp 2(p-C=CC=C) (96) as diaste-reotopic mixtures. Fractional crystallization leads to diastereotopic enrichment, or resolution for R = Ph, which permitted cystallographic assignment of the configuration. 13C-Labeled complexes were prepared and... 

This amine is used to advantage instead of ammonia in the Glaser oxidative coupling of terminal acetylenes. ... 

For Glaser oxidative coupling of phenylacetylene to Campbell and Eglinton used cupric acetate in pyridine-methanol. The deep blue suspension became green when refluxed (1 hr.). The cooled mixture was acidified with stirring and cooling and the product was collected by ether extraction. 

Figure 11 Principle of the four-reacting centre approach to [3]catenanes. The black triangle represents a terminal acetylenic function able to react with itself in a Glaser oxidative coupling reaction.

Monomer 1 was prepared, with an overall yield of 71%, through a three step synthetic sequence, using known experiment procedures (18-20). Diyne dimer 2 was synthetized (94%) according to a mo fied Glaser oxidative catalytic coupling of 1 (27). Straus enyne dimer 2 (Z configuration) was obtained (83%),... 

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