107045-53-4Relevant articles and documents
Catalytic enantioselective rearrangement of meso-epoxides mediated by chiral lithium amides in the presence of excess cross-linked polymer-bound lithium amides
Seki, Atsushi,Asami, Masatoshi
, p. 4655 - 4663 (2002)
Insoluble polymer-bound achiral lithium dialkylamides were prepared from the corresponding cross-linked polymer-bound amines and butyllithium. The polymer-bound achiral reagent was applied to a catalytic enantioselective rearrangement of meso-epoxides as an in situ regenerating agent of a chiral lithium amide. The efficiency of the catalytic system was improved, and chiral allylic alcohol derivatives were obtained in high enantiomeric excesses by using excess polymer-bound reagents and a sub-stoichiometric amount of chiral lithium amide, prepared from (2S,3aS,7aS)-2-(pyrrolidin-1-ylmethyl)octahydroindole. The reaction was successfully applied in the synthesis of (1S,4R)-4-benzoylamino-2-cyclopentenol, a useful chiral synthetic intermediate for carbocyclic nucleosides, in 97% ee.
Cis-fused ring-containing β-lactam the synthetic method of the compound of
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Paragraph 0073-0076, (2016/12/01)
The invention discloses a synthetic method of a beta-lactam compound with a cis condensed ring. Substituted or un-substituted pyrrole-2-formic acid, or substituted or un-substituted pyridine-2-formic acid or substituted or un-substituted indole-2-formic acid is used as a starting material, Pd(II) is adopted as a catalyst, and AgOAc or Ag2CO3 is used as an oxidant; a sp3C-H bond at a beta site of an amide substrate 2 (for example Scheme4) is activated through palladium catalysis; a key step of forming a C-N bond in a molecule to successfully construct a beta-lactam framework with the cis condensed ring is generated. According to the synthetic method disclosed by the invention, materials are simple and easily available, the price is cheap, the experiment operation is simple, the route is short and the yield is high; the synthetic method has very high atom economy, a little waste, environment friendliness, a wide scope of application of the substrate and good universality, and can be used for efficiently obtaining the beta-lactam compound with optical activity kept in a chiral manner.
Synthesis of new perhydroindole derivatives and their evaluation in ruthenium-catalyzed hydrogen transfer reduction
Liegault, Benoit,Tang, Xiaoping,Bruneau, Christian,Renaud, Jean-Luc
experimental part, p. 934 - 940 (2009/04/05)
New perhydroindole derivatives were synthesized with good yields and evaluated as chiral ligands in the RuII-catalyzed hydride transfer reduction of acetophenone. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.