Results 171 to 180 of about 99,145 (214)
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Transition Metal Complexation in 1,3-Dipolar Cycloadditions
HETEROCYCLES, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
BROGGINI, GIANLUIGI +3 more
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Dipolar Cycloaddition Reactions of Nitrilimines
Australian Journal of Chemistry, 1998A series of ?-substituted a-methylidene-?-butyrolactone derivatives underwent regiospecific 1,3-dipolar cycloaddition with N -methyl- C -phenylnitrilimine. These reactions proceeded regiospecifically and with high diastereoselectivity, generally favouring the anti diastereomer as determined by n.m.r.
Dunstan, J. +5 more
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Dipolar Cycloadditions of Nitrones in Aqueous Media
HETEROCYCLES, 20161,3-Dipolar cycloadditions of nitrones in aqueous media have been recently exploited as a non-conventional protocol in the synthesis of the fully- or partly-saturated isoxazole ring. Water as the reaction medium can affect positively both cycloaddition rates and yields, while the large array of latent functionalities displayed by the cycloadducts is of
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1,3‐Dipolar cycloadditions to alkyldicyanamides
Recueil des Travaux Chimiques des Pays-Bas, 1981AbstractThe 1,3‐dipoles 2,4,6‐trimethylbenzonitrile oxide and benzyl azide react with alkyldicyanamides (1) to give the 3,5‐disubstituted 1,2,4‐oxadiazoles 2 and the 1,5‐disubstituted tetrazole 4, respectively, by (3 + 2)‐cycloaddition. The structure of 4 has been determined by a single crystal X‐ray analysis.
P. H. Benders +2 more
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Concertedness of 1,3-dipolar cycloadditions
Journal of Chemical Education, 1984The 1,3-dipolar cycloaddition is the union of a 1,3-dipole with a multiple bond system (a dipolarophile) to form a five-membered ring; the process is regarded as one of the most general methods for the synthesis of five-membered heterocycles.
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