Department of Chemical Sciences and Technologies, University of Roma Tor Vergata, Via Ricerca Scientifica snc, Rome, 00133, Italy.
Dalton Trans. 2013 Sep 7;42(33):11963-70. doi: 10.1039/c3dt50907a.
A sustainable V(V) and Mo(VI) catalysed two-phase procedure for bromination of toluene under quite mild conditions is proposed; H2O2 is the primary oxidant and KBr is the bromine source; metal precursors are commercially available salts. The reaction is efficient without any additional solvent. By using PhCH3 as a solvent/substrate good yields, together with interesting selectivity toward the formation of PhCH2Br, are obtained with both metal ions. Recycling of the catalytic phase is also possible. Useful information on the V-peroxido chemistry was obtained.
提出了一种在温和条件下可持续的 V(V) 和 Mo(VI) 催化的甲苯溴化两相法；H2O2 是主要氧化剂，KBr 是溴源；金属前体是市售盐。该反应在没有任何额外溶剂的情况下也很有效。使用 PhCH3 作为溶剂/底物，两种金属离子都能获得良好的收率和对 PhCH2Br 形成的有趣选择性。催化相的回收也是可能的。还获得了有关 V-过氧化学的有用信息。
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