SELECTIVITY IN CYCLOADDITIONS-XII THE DIRECTIVE EFFECT OF ENOL ETHERS AND THIOENOL ETHERS IN CYCLOADDITIONS OF NITRILE OXIDES
Cycloadditions of nitrile oxides to 2,3-dihydrofuran are highly regioselective whereas the regioselectivity of the cycloadditions to 2,3-dihydrothiophen is only moderate.The directing effect of oxygen and sulfur in these cycloadditions could be evaluated
Caramella, P.,Bandiera, T.,Gruenanger, P.,Albini, F. Marinone
p. 441 - 453
(2007/10/02)
SELECTIVITY IN CYCLOADDITIONS-X. REGIOCHEMISTRY OF CYCLOADDITIONS OF NITRILE OXIDES TO THIOPHENE AND BENZOTHIOPHENE 1,1-DIOXIDES
Thiophene-1,1-dioxide undergoes regioselective cycloaddition to benzonitrile oxide.In the reaction with the less reactive mesitonitrile oxide the sulfur dioxide deriving from the dimerization of the dipolarophile causes a catalytic decomposition of the ni
Albini, F. Marinone,Ceva, P.,Mascherpa, A.,Albini, E.,Caramella, P.
p. 3629 - 3639
(2007/10/02)
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