Isonitrile Trapping Reactions under Thermolysis of Alkoxyamines for the Synthesis of Quinolines
摘要:
An efficient tandem radical process comprising a thermal alkoxyamine homolysis, an isonitrile trapping reaction, a 5-exo-trig cyclization, and a homolytic aromatic substitution leads to substituted dihydroquinolines. Depending on the substituent R-1, oxidation to dihydro-1H-cyclopenta[b]quinolines (for R-1 = aryl) or tautomerization to tetrahydro-1H-cyclopenta[b]quinolines (for R-1 = CO2Me, CN) occurs. The heterocycles are obtained in moderate to good yields. Upon using microwave-induced heating, the reaction time can be shortened from 3 days to 30 min.
Isonitrile Trapping Reactions under Thermolysis of Alkoxyamines for the Synthesis of Quinolines
摘要:
An efficient tandem radical process comprising a thermal alkoxyamine homolysis, an isonitrile trapping reaction, a 5-exo-trig cyclization, and a homolytic aromatic substitution leads to substituted dihydroquinolines. Depending on the substituent R-1, oxidation to dihydro-1H-cyclopenta[b]quinolines (for R-1 = aryl) or tautomerization to tetrahydro-1H-cyclopenta[b]quinolines (for R-1 = CO2Me, CN) occurs. The heterocycles are obtained in moderate to good yields. Upon using microwave-induced heating, the reaction time can be shortened from 3 days to 30 min.
Isonitrile Trapping Reactions under Thermolysis of Alkoxyamines for the Synthesis of Quinolines
作者:Birgit Janza、Armido Studer
DOI:10.1021/ol0604421
日期:2006.4.1
An efficient tandem radical process comprising a thermal alkoxyamine homolysis, an isonitrile trapping reaction, a 5-exo-trig cyclization, and a homolytic aromatic substitution leads to substituted dihydroquinolines. Depending on the substituent R-1, oxidation to dihydro-1H-cyclopenta[b]quinolines (for R-1 = aryl) or tautomerization to tetrahydro-1H-cyclopenta[b]quinolines (for R-1 = CO2Me, CN) occurs. The heterocycles are obtained in moderate to good yields. Upon using microwave-induced heating, the reaction time can be shortened from 3 days to 30 min.