Catalytic Asymmetric Benzaldehyde Cyanohydrin Synthesis with Synthetic Optically Active Polymer. III.N-Substituted Poly-(s)-isobutylethylenimine
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چکیده
منابع مشابه
Catalytic Asymmetric Synthesis of Highly Substituted Pyrrolizidines.
A catalytic asymmetric double (1,3)-dipolar cycloaddition reaction has been developed. Using a chiral silver catalyst, enantioenriched pyrrolizidines can be prepared in one flask from inexpensive, commercially available starting materials. The pyrrolizidine products contain a variety of substitution patterns and as many as six stereogenic centers.
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During asymmetric cyanohydrin synthesis catalysed by vanadium(V)oxo(salen) complexes, the catalysts are reduced to vanadium(IV)oxo(salen) as determined by EPR spectroscopy; the reducing agent is cyanide which is oxidised to cyanogen via a non-radical mechanism.
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Ethyl L-lysine dihydrochloride was reacted with three different dianhydrides to yield the poly (ethyl L-lysinimide)s (PI(1-3)); it was also reacted with two different diacyl chlorides to yield the poly (ethyl L-lysinamide)s (PA(4-5)). The resulting polymers have inherent viscosities in the range of 0.15 to 0.42 dL g(-1). These polymers are prepared from an inexpensive starting material and are ...
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A variety of 3-substituted benzisoxazoles were reduced with hydrogen using the chiral ruthenium catalyst, {RuCl(p-cymene)[(R,R)-(S,S)-PhTRAP]}Cl. The ruthenium-catalyzed hydrogenation proceeded in high yield in the presence of an acylating agent, affording α-substituted o-hydroxybenzylamines with up to 57% ee. In the catalytic transformation, the N-O bond of the benzisoxazole substrate is reduc...
متن کاملCatalytic Asymmetric Synthesis
Course objectives: At the end of this course you should be able to: • Recognise the types of functional groups which can be prepared by catalytic asymmetric methods discussed in the course; • Use this knowledge in planning the synthesis of enantiomerically enriched compounds from given prochiral starting materials; • Outline the scope and limitations of any methods you propose, with respect to ...
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ژورنال
عنوان ژورنال: Bulletin of the Chemical Society of Japan
سال: 1966
ISSN: 0009-2673,1348-0634
DOI: 10.1246/bcsj.39.698