Synthesis of optically active .beta.-lactams by the photolytic reaction of imines with optically active chromium carbene complexes
作者:Louis S. Hegedus、Rene Imwinkelried、Marie Alarid-Sargent、Dalimil Dvorak、Yoshitaka Satoh
DOI:10.1021/ja00159a034
日期:1990.1
Opticallyactivechromium carbene complexes utilizing (S)-valine- and (R)-phenylglycine-derived chiral auxillaries were synthesized and subjected to photolytic reaction with a number of imines. Opticallyactive β-lactams were produced in good to excellent chemical yield and with high diastereoisomeric excess. Procedures for removal of the chiral auxilliary to produce the opticallyactive free amino
Facile microwave-assisted synthesis of thioformamides from isocyanides and carbon disulfide
作者:Sònia Abás、Ulrike Moens、Carmen Escolano
DOI:10.1016/j.tetlet.2017.06.001
日期:2017.7
A new, fast, solvent-free and efficient method is provided to prepare thioformamides by reacting isocyanides derivatives, carbon disulfide and benzylamine under microwave irradiation.