Photoinduced addition of methanol to 5(S)-5-triisopropylsiloxymethyl-N- boc-dihydropyrrole-2(5H)-one: A new route to 4(S), 5(S)-disubstituted pyrrolidin-2-ones

Article abstract of DOI:10.1016/S0040-4020(98)01094-1

We describe the photoinduced addition of methanol to 5(S)-5- triisopropylsiloxymethyl-N-boc-dihydropyrrole-2(5H)-one to produce 5(S)-5- triisopropylsiloxymethyl-4(S)-hydroxymethyl-pyrrolidine-2-one, and conversion of this into a variety of 4(S), 5(S)-pyrrolidine-2-ones. Photo-induced addition of methanol to 5(R)-N-boc-5-amino-dihydropyran-2(5H)-one yielded the unexpected product 4(S)-1'-[2'-hydroxy, 1'-(R)-N-boc-amino]ethyl- tetrahydrofuran-2-one via rearrangement of the initial photoadduct.