“…The assignments refer to the numbering reported below. The products 3 and 6 have been synthesized following literature procedures. , The monomers 2c , d and the trimers syn - 1c , d and anti - 1c , d are described elsewhere. 1a,c,e,h …”
Copper(I) thiophen-2-carboxylate was successfully employed in the trimerization of [2.2.1] bicyclic vic-bromotrimethyltin olefins (in their racemic composition), bearing different functionalities, to invariably obtain almost quantitative yields of the syn and anti tris-annelated benzenes. The two isomers come in different ratios, smaller than or equal to the statistical 1:3 ratio, depending on the steric hindrance opposed by the functionalities. In the case of enantiopure (3-bromo-4,7,7-trimethylbicyclo[2.2.1]hept-2-en-2-yl)trimethylstannane, the 1:9 ratio found with Cu(NO(3))(2).3H(2)O increases to 1:6.
“…The assignments refer to the numbering reported below. The products 3 and 6 have been synthesized following literature procedures. , The monomers 2c , d and the trimers syn - 1c , d and anti - 1c , d are described elsewhere. 1a,c,e,h …”
Copper(I) thiophen-2-carboxylate was successfully employed in the trimerization of [2.2.1] bicyclic vic-bromotrimethyltin olefins (in their racemic composition), bearing different functionalities, to invariably obtain almost quantitative yields of the syn and anti tris-annelated benzenes. The two isomers come in different ratios, smaller than or equal to the statistical 1:3 ratio, depending on the steric hindrance opposed by the functionalities. In the case of enantiopure (3-bromo-4,7,7-trimethylbicyclo[2.2.1]hept-2-en-2-yl)trimethylstannane, the 1:9 ratio found with Cu(NO(3))(2).3H(2)O increases to 1:6.
Novel Carbocyclic Nucleoside Containing a Cyclopentyl Ring and Uracil.-With a view to getting more information about the structureactivity relationships of carbocyclic analogues of nucleosides the uridine derivative (IX) is synthesized. -(BALO, C.; FERNANDEZ, F.; LENS, E.; LOPEZ, C.; Chem.
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