Download Advances in Heterocyclic Chemistry, Vol. 34 by Alan R. Katritzky (ed.) PDF

By Alan R. Katritzky (ed.)

Meant for natural chemists, this quantity follows the layout of past volumes and offers up to date info on chosen parts of heterocyclic chemistry.

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IV . Chemical Reactions . . . . . . . A . Thermal Reactions Formally Involving No Other Species 53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 . 55 . 55 . 56 . 56 . 57 . 58 . 58 . 59 . 59 . 60 . 61 . 62 . 62 . 64 . 64 . 65 . 65 . 65 . 65 . 65 . 65 . 66 . 67 . . . . 67 . . .

4 6 . 5 3 . "' Aryl groups migrate to the exclusion of alkyl g r o ~ p s , ' ~ ' ~ . ' ' ' which ~ " ~ ~ them'~~ selves move only at high t e m p e r a t u r e ~ . DMSO FNMe MecN Me + H (145) (146) (147) SCHEME 47 For the cases where all carbon atoms are fully substituted, competitive migration occurs to C and N, giving 129 (or its degradation products) and 131. '" In some instances only the product from migration to carbon was o b ~ e r v e d , " , ' ~ , ' ~ , whereas ' ~ , ' ~ ' in others, only the N-substituted p r o d ~ c t .

IV . Chemical Reactions . . . . . . . A . Thermal Reactions Formally Involving No Other Species 53 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 . 55 . 55 . 56 . 56 . 57 . 58 . 58 . 59 . 59 . 60 . 61 . 62 . 62 . 64 . 64 . 65 . 65 . 65 . 65 . 65 . 65 . 66 . 67 . . . . 67 . . .

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