Extremely Powerful Chiral 2-Oxazolidinone Auxiliaries.
نویسندگان
چکیده
منابع مشابه
Chiral Auxiliaries in Asymmetric Synthesis
Background The use of chiral auxiliaries in the synthesis of enantiomerically pure compounds has found wide application for a variety of reactions over the last three decades. Despite the extensive developments in this area by many academic and industrial research groups, new auxiliary controlled reactions continue to evolve frequently [1]. First objectives in this area have been to develop chi...
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Helicenes are unique helical chromophores possessing advanced and well-controlled spectral and chemical properties owing to their diverse functionalization and defined structures. Specific modification of these molecules by introducing aromatic rings of differing nature and different functional groups results in special chiroptical properties, making them effective chiral auxiliaries and supram...
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Thirteen enantiopure paddlewheel-shaped dirhodium(II) tetrakiscarboxylate complexes have been checked for their efficiency in the dirhodium method (differentiation of enantiomers by NMR spectroscopy); six of them are new. Their diastereomeric dispersion effects were studied and compared via so-called key numbers KN. Adducts of each complex were tested with five different test ligands representi...
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www.sciencemag.org (this information is current as of July 30, 2007 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/317/5837/496 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/317/5837/496/DC1 can be found a...
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[reaction: see text] Highly diastereoselective acetate aldol additions using chlorotitanium enolates of mesityl-substituted N-acetyloxazolidinethione and N-acetylthiazolidinethione auxiliaries are reported. These additions proceed in high yields and diastereoselectivities (93:7 to 98:2) for aliphatic, aromatic, and ,-unsaturated aldehydes. Double diastereoselective acetate aldol additions are a...
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ژورنال
عنوان ژورنال: Journal of Synthetic Organic Chemistry, Japan
سال: 1995
ISSN: 0037-9980,1883-6526
DOI: 10.5059/yukigoseikyokaishi.53.95