Lanthanide- and DMSO-Induced Ring Opening of 2-Iminooxetanes: Synthesis of .beta.-Lactams and .beta.-Keto Amides
摘要:
2-Iminooxetanes (1), generated by lanthanide-catalyzed heterocycloaddition of aldehydes to ketene imines, are versatile synthons for beta-lactams (2) and for beta-keto amides (3). Conversion of 1 into 2 and 3 can be accomplished by either lanthanide-induced or oxidative (DMSO) ring opening, respectively.
2-Iminooxetanes (1), generated by lanthanide-catalyzed heterocycloaddition of aldehydes to ketene imines, are versatile synthons for beta-lactams (2) and for beta-keto amides (3). Conversion of 1 into 2 and 3 can be accomplished by either lanthanide-induced or oxidative (DMSO) ring opening, respectively.