Iron(III) Chloride Catalyzed Synthesis of Functionalized Spiropyrimidines
摘要:
Potentially bioactive pyrimidine-annulated spiroheterocyclic compounds are synthesized in good to excellent yields using readily available, cheap and environmentally friendly iron(III) chloride (FeCl3) as the catalyst. The process is straightforward and provides a diverse range of spiropyrimidine derivatives via the 5-endo-dig mode of cyclization, starting from simple and easily available starting materials.
Iron(III) Chloride Catalyzed Synthesis of Functionalized Spiropyrimidines
作者:K. Majumdar、Sudipta Ponra、Tapas Ghosh
DOI:10.1055/s-0033-1338533
日期:——
Potentially bioactive pyrimidine-annulated spiroheterocyclic compounds are synthesized in good to excellent yields using readily available, cheap and environmentally friendly iron(III) chloride (FeCl3) as the catalyst. The process is straightforward and provides a diverse range of spiropyrimidine derivatives via the 5-endo-dig mode of cyclization, starting from simple and easily available starting materials.
Facile Regioselective Synthesis of Functionalized Heterocycle-Tethered Spiro Compounds via an Intramolecular Electrophilic Ipso-Iodocyclization Process
作者:K. Majumdar、Tapas Ghosh、Pranab Shyam
DOI:10.1055/s-0031-1289526
日期:2011.11
A general, regioselective, and efficient intramolecular electrophilic ipso-iodocyclization of a series of N-alkyl-N-aryl phenylpropiolamides in the presence of I2 (molecular iodine) and NaHCO3 via 5-endo-dig mode of cyclization has been developed for the synthesis of hitherto unreported coumarin, quinolone, and pyrimidine-annelated heterocycliccompounds in excellent yields (84-92%). The development