132127-34-5Relevant articles and documents
A convenient synthesis of the paclitaxel side-chain via a diastereoselective Staudinger reaction
Brown, Stephen,Jordan, Allan M.,Lawrence, Nicholas J.,Pritchard, Robin G.,McGown, Alan T.
, p. 3559 - 3562 (1998)
The N-benzylidene dexivative of (S)-(-)-1-(p-mathoxyphenyl)propyl-1- amine, obtained by a new resolution procedure, exhibits moderate selectivity in the reaction with 2-acetoxyketene; the (S)-(-)-1-(p-methoxyphenyl)propyl group can be oxidatively cleaved from the resultant β-lactam, an important precursor for taxane semi-synthesis.
Asymmetric synthesis of 3-amino-2-hydroxyalkanoates by Mannich reaction of menthyl acetate with imines and subsequent oxidation
Hata, Seiji,Tomioka, Kiyoshi
, p. 8514 - 8520 (2008/02/09)
Lithium amide-assisted Mannich-type reaction of menthyl acetate-derived lithium enolate with PMP-arylaldimines and subsequent in situ oxidation with oxaziridine gave syn-3-amino-3-aryl-2-hydroxypropanoates with high syn-selectivity and diastereoselectivit
Beta-lactam synthesis
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Page/Page column 10, (2008/06/13)
The present invention is directed to a process for the preparation of β-lactams. Generally, an imine is cyclocondensed with a ketene acetal or enolate to form the β-lactam product in a "one pot" synthesis, this process is generally performed at a higher temperature than conventional processes.
Studies on stereoselective [2+2] cycloadditions between N,N-dialkylhydrazones and ketenes
Martin-Zamora, Eloisa,Ferrete, Ana,Llera, Jose M.,Munoz, Jesus M.,Pappalardo, Rafael R.,Fernandez, Rosario,Lassaletta, Jose M.
, p. 6111 - 6129 (2007/10/03)
Staudinger-like cycloadditions between chiral, non-racemic N,N-dialkylhydrazones 1 and functionalized ketenes constitute an efficient methodology for the stereoselective construction of the β-lactam ring. The potential for fine tuning of the dialkylamino
N,N-dialkylhydrazones as the imine component in the Staudinger-like [2+2] cycloaddition to benzyloxyketene
Fernandez, Rosario,Ferrete, Ana,Lassaletta, Jose M.,Llera, Jose M.,Martin-Zamora, Eloisa
, p. 831 - 833 (2007/10/03)
To overcome the limitations of using unstable imines in Staudinger cycloadditions to ketenes, aldehyde N,N-dialkylhydrazones 1 were used as stable imines. This strategy and a fine tuning of the auxiliary result in a straightforward synthesis of cycloadducts 2, deprotected β-lactams 3, and isoserines 4 (see scheme: a) Et3N, toluene, Δ; b) 1. magnesium monoperoxyphthalate, 2. H2, Pd/C; c) H+).
β-lactams, methods for the preparation of taxanes, and sidechain-bearing taxanes
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Page column 11, (2010/01/30)
Novel β-lactams finding utility as intermediates in the preparation of sidechain-bearing taxanes such as taxol and taxol derivatives. The present invention also relates to novel methods of coupling β-lactams to form such sidechain-bearing taxanes, and to novel sidechain-bearing taxanes.
β-lactams, methods for the preparation of taxanes, and sidechain-bearing taxanes
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Page column 11, (2010/01/30)
Novel β-lactams finding utility as intermediates in the preparation of sidechain-bearing taxanes such as taxol and taxol derivatives. The present invention also relates to novel methods of coupling β-lactams to form such sidechain-bearing taxanes, and to
A new synthetic route to (3R,4S)-3-hydroxy-4-phenylazetidin-2-one as a taxol side chain precursor
Song, Choong Eui,Lee, Sung Woo,Roh, Eun Joo,Lee, Sang-Gi,Lee, Won-Ku
, p. 983 - 992 (2007/10/03)
A new synthetic route to (3R,4S)-3-hydroxy-4-phenylazetidin-2-one, an important precursor for the paclitaxel side chain, has been developed using intramolecular cyclization of N-(p-methoxyphenyl) (2S,3R)-2-acetoxy-3-bromo- 3-phenylpropionamide which can be easily obtained by catalytic asymmetric dihydroxylation of N-(p-methoxyphenyl)-trans-cinnamide, followed by bromoacetylation.
Anti-tumor compounds, pharmaceutical compositions, methods for preparation thereof and for treatment
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, (2008/06/13)
The present invention is directed to novel taxanes useful as chemotherapeutic agents or their precursors. Processes for preparing the novel taxanes include coupling reactions, in the presence of a base, of baccatin of formula (III) or (IV) STR1 with β-lac
Anti-tumor compounds, pharmaceutical compositions, methods for preparation thereof and for treatment
-
, (2008/06/13)
The present invention is directed to novel taxanes useful as chemotherapeutic agents or their precursors. Processes for preparing the novel taxanes include coupling reactions, in the presence of a base, of baccatin of formula (III) or (IV) STR1 with β-lac