1. For reviews for the benzylic oxidations, see Walter, D. S. In Comprehensive Organic Functional Group Transformations; Katrizky, A. R., Meth-Cohn, O., Ress, C. W., Pattenden G., Eds.; Pergamon: Oxford, 1995, Vol. 3, pp 293–294.
2. Larock, R. C. Comprehensive Organic Transformations: A Guide to Functional Group Preparations; Wiley-VCH: New York, 1999, pp 976, 1205-1207, 1625-1626.
3. Handbook of Reagents for Organic Synthesis: Oxidizing and Reducing Agents; Burke, S. D.,Danheiser, R. L., Eds.; Wiley: Chichester, 1999.
4. Handbook of Reagents for Organic Synthesis: Reagents for Direct Functionalization of C–H Bonds; Paquette, L. A., Fuchs P. L., Eds.; Wiley: Chichester, 2007.
5. Chromium-pillared clay as a catalyst for benzylic oxidation and oxidative deprotection of benzyl ethers and benzylamines: a simple and convenient procedure