Brønsted Acid-assisted Intramolecular Aminohydroxylation of N-Alkenylsulfonamides under Heavy Metal-free Conditions
摘要:
The intramolecular aminohydroxylation of N-alkenylsulfonamides proceeded under heavy metal-free conditions to give substituted prolinol derivatives in high yields. Oxone activated by catalytic Bronsted acid worked well as an electrophilic oxidant for this reaction.
Brønsted Acid-assisted Intramolecular Aminohydroxylation of N-Alkenylsulfonamides under Heavy Metal-free Conditions
摘要:
The intramolecular aminohydroxylation of N-alkenylsulfonamides proceeded under heavy metal-free conditions to give substituted prolinol derivatives in high yields. Oxone activated by catalytic Bronsted acid worked well as an electrophilic oxidant for this reaction.
N-sulfonylated lactams of various ring sizes (from 5- to 8-membered rings) followed by a ring contraction reaction. The selective monohalogenation of N-sulfonyl lactams has been achieved in modest to excellent yields (9 examples, 39–96%) using N-halogenosuccinimides via the in situ generation of trimethylsilyl ketene aminal derivatives. The so-obtained α-halogeno N-sulfonyl lactams were engaged in
Brønsted Acid-assisted Intramolecular Aminohydroxylation of <i>N</i>-Alkenylsulfonamides under Heavy Metal-free Conditions
作者:Katsuhiko Moriyama、Yuta Izumisawa、Hideo Togo
DOI:10.1021/jo301523a
日期:2012.11.2
The intramolecular aminohydroxylation of N-alkenylsulfonamides proceeded under heavy metal-free conditions to give substituted prolinol derivatives in high yields. Oxone activated by catalytic Bronsted acid worked well as an electrophilic oxidant for this reaction.