Stereoselective Allylation of 4-Oxoazetidine-2-carbaldehydes. Application to the Stereocontrolled Synthesis of Fused Tricyclic β-Lactams via Intramolecular Diels−Alder Reaction of 2-Azetidinone-Tethered Trienes
作者:Benito Alcaide、Pedro Almendros、Nati R. Salgado
DOI:10.1021/jo991641j
日期:2000.6.1
Allylation reactions of racemic and optically pure 4-oxoazetidine-2-carbaldehydes were investigated both under anhydrous conditions and in aqueous media. Different Lewisacid or metal mediators showed varied diastereoselectivities on product formation during allylation reactions of the above aldehydes with allyltrimethylsilane, allyltributylstannane, or allyl bromide. Under standard reaction conditions