103174-02-3Relevant articles and documents
Metal-mediated carbonyl-1,3-butadien-2-ylation by 1,4-bis(methanesulfonyl)-2-butyne or 1,4-dibromo-2-butyne in aqueous media: Asymmetric synthesis of 3-substituted 3-hydroxy-β-lactams
Alcaide, Benito,Almendros, Pedro,Rodriguez-Acebes, Raquel
, p. 1925 - 1928 (2002)
Metal-mediated 1,3-butadien-2-ylation reactions between 1,4-dibromo-2-butyne or 1,4-bis(methane-sulfonyl)-2-butyne and optically pure azetidine-2,3-diones were investigated in aqueous media, offering a convenient asymmetric entry to the potentially bioactive 3-substituted 3-hydroxy-β-lactam moiety. The diastereoselectivity of the addition reaction was controlled by the bulky chiral auxiliary at C4. However, while the regioselectivity of the process was full, the chemical yield of the addition was a function of the nature of both the metal reagent and the system solvent as well. In addition, 2-azetidinone-tethered 1,3-butadienes can easily be transformed into other functionalities via Diels-Alder reaction.
Stereoselective synthesis of-lactams under diverse conditions: Unprecedented Observations
Das, Aparna,Bose, Ajay K.,Banik, Bimal Krishna
, p. 917 - 925 (2020/12/04)
ferent reaction conditions have been used for this study. It is important to note that the stereochemistry of the-lactam formation reaction depends on the conditions of the experiments, structures of the imines and acid chlorides, order of addition of the
N1-C4 β-lactam bond cleavage in the 2-(trimethylsilyl)thiazole addition to β-lactam aldehydes: Asymmetric synthesis of spiranic and tertiary α-alkoxy-γ-keto acid derivatives
Alcaide, Benito,Almendros, Pedro,Redondo, Maria C.
, p. 3707 - 3710 (2008/03/18)
Starting substrates, enantiopure spiranic or 3-substituted 3-alkoxy-4-oxoazetidine-2-carbaldehydes, were prepared from (R)-2,3-O- isopropylideneglyceraldehyde derived azetidine-2,3-diones by sequential Barbier-type addition reactions followed by hydroxy f