148968-09-6Relevant articles and documents
Optically active 4-formyl β-lactams: Microwave-induced deacetonation-oxidation
Yadav, Ram Naresh,Banik, Indrani,Banik, Bimal Krishna
, p. 1389 - 1391 (2020/06/27)
Microwave-induced chiral synthesis of 4-formyl β-lactams is performed following a one-pot reaction. The deprotection of the ketal with aqueous bismuth nitrate and subsequent oxidation of the diol to aldehyde by aqueous sodium metaperiodate is accomplished
Stereocontrolled access to orthogonally protected anti,anti-4- aminopiperidine-3,5-diols through chemoselective reduction of enantiopure β-lactam cyanohydrins
Alcaide, Benito,Almendros, Pedro,Cabrero, Gema,Ruiz, M. Pilar
, p. 7980 - 7991 (2008/02/13)
(Chemical Equation Presented) The cyanosilylation of enantiopure 4-oxoazetidine-2-carbaldehydes with tert-butyldimethylsilyl cyanide was promoted by either molecular sieves or catalytic amount of sodium carbonate to give O-silylated β-lactam cyanohydrins
A practical ruthenium-catalyzed cleavage of the allyl protecting group in amides, lactams, imides, and congeners
Alcaide, Benito,Almendros, Pedro,Alonso, Jose M.
, p. 2874 - 2879 (2008/02/03)
A convenient methodology for the deprotection of N-allylic amide-like moieties was developed. The first examples accounting for the ruthenium-catalyzed deallylation of amides, lactams, imides, pyrazolidones, hydantoins, and oxazolidinones have been achieved by the sequential use of Grubbs carbene (isomerization step) and RuCl3 (oxidation step). A variety of substrates, including enantiopure multifunctional β- and γ-lactams, can be employed.
Application of (+)-(1S,2S)-2-amino-1-phenylpropan-1,3-diol in the formal total synthesis of carbapenems, novel 4-cyano-β-lactams and β-hydroxy aspartates
Jayaraman, Muthusamy,Deshmukh, Rakeep,Bhawal, Baburao M.
, p. 8989 - 9004 (2007/10/03)
The imines derived from (+)-(1S,2S)-2-amino-1-phenylpropan-1,3-diol furnished cis-β-lactams stereoselectively on the Staudinger reaction. These homochiral cis-β-lactams were converted in to cis-β-lactams possessing aminol side chain at C-4. These aminols
Synthesis of optically pure 4-cyano and 4-formyl cis-β-lactams via enantiospecific Staudinger reaction
Javaraman,Nandi,Sathe,Deshmukh,Bhawal
, p. 609 - 612 (2007/10/02)
Imines 1 and 2 derived from (+)-(1S,2S)-2-amino-1-phenylpropan-1,3-diol on cycloaddition reaction using acid chlorides (or equivalent) 3-6 in the presence of triethylamine furnished stereoselectively cis-β-lactams 7a-f in good yields. The aminols 8b,c on treatment with lead tetraacetate under different reaction conditions gave 4-cyano (9b,c) and 4-formyl (10b,c) β-lactams in high yields.
Diastereoselective synthesis of bis-beta-lactams
Bose, Ajay K.,Womelsdorf, John F.,Krishnan, Lalitha,Urbanczyk-Lipkowska, Zofia,Shelly, Dennis C.,Manhas, Maghar S.
, p. 5379 - 5390 (2007/10/02)
Schiff bases derived from (±)-4-aldehydo-2- -azetidinones react with acid chlorides and triethylamine to produce (±)-bis-β-lactams in a diastereoselective fashion. The steric course of β-lactam fonnation was determined in one case by using chiral HPLC sep
A novel, general, totally stereoselective one-pot synthesis of cis-3-substituted 4-formylazetidin-2-ones
Alcaide,Martin-Cantalejo,Plumet,Rodriguez-Lopez,Sierra
, p. 803 - 806 (2007/10/02)
A general, totally stereoselective one-pot synthesis of cis-3-substituted-4-formylazetidin-2-ones based upon the reaction of acid chlorides and 1,4-bis-(4-methoxyphenyl)-1,4-diazabuta-1,3-diene, as synthetic equivalent of the corresponding unknown α-formy