Abstract
2-Methyl-3,4-dihydro-1 H-2-benzoselenopyranium salt (1) was reduced by some metallic reagents or magnesium metal via the single-electron transfer (SET) process to give 2-[2-(methylseleno)ethyl]-toluene (2). Magnesium metal was a good SET reducing agent. Some other selenonium or sulphonium salts (7), (14). (22), (27) and (32) were similarly reduced by magnesium. Particularly, sonication accelerated the reductions. Iµ-Eneselenonium salt (43) was treated with activated magnesium to give a cyclised pyrrolidine derivative (44).
Published Version
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