Friedel-Crafts Benzylation of Activated and Deactivated Arenes
作者:Gabriel Schäfer、Jeffrey W. Bode
DOI:10.1002/anie.201105380
日期:2011.11.11
going back makes possible facile Friedel–Craftsbenzylations with moderate reaction temperatures, simple reaction workups, and improved substrate scope for the formation of synthetically important diarylmethanes (see scheme). Upon complexation with BF3⋅OEt2, hydroxamates serve as reversible leaving groups that stabilize highly reactive carbocations. Even deactivatedarenes and electron‐deficient benzylhydroxamates
Hypophosphorous acid–iodine: a novel reducing system. Part 2: Reduction of benzhydrols to diarylmethylene derivatives
作者:Paul E Gordon、Albert J Fry
DOI:10.1016/s0040-4039(00)02159-6
日期:2001.1
A mixture of hypophosphorousacid (H3PO2) and iodine in acetic acid reduces a variety of substituted benzhydrols to the corresponding methylene derivatives in very high yields. The active reducing agent is hydrogen iodide generated by reactionbetweeniodine and hypophosphorousacid.
次磷酸(H 3 PO 2)和碘在乙酸中的混合物可以以很高的产率将各种取代的苯氢酚还原为相应的亚甲基衍生物。活性还原剂是碘与次磷酸反应生成的碘化氢。