Studies On The Application Of Photoinduced Electron Transfer Reactions In Synthetic Methodology

This thesis deals with the studies on synthetically useful photoinduced electron transfer (PET) reactions. Besides a concise review on the new progress made in this field in recent years, it mainly describes several synthetically useful PET reactions which are outlined as follows:1. A simple photochemical approach for reductive radical cyclization of ortho-substituted aromatic halides in the presence of sodium borohydride was well established to construct five- and six- membered rings in organic synthesis.2. The photoinduced electron transfer reaction between N-tosyl amides and 2-phenyl-N, N'-dimethyl benzimidazoline (PDMBI) provides an efficient approach for the deprotection of N-tosyl amides.3. Ascorbic acid (vitamin C), a well-known natural antioxidant, was successfully used to remove the sulfonyl group of α-phenylsulfonyl acetophenone derivatives by photochemical method.