All-carbon [3 + 2] cycloaddition in natural product synthesis
نویسندگان
چکیده
منابع مشابه
synthesis of some new sugar based 3, 3-disubstituted monocyclic β-lactams by asymmetric [2+2] cycloaddition reactions
synthesis of some new monocyclic β-lactams containing a quaternary carbon center via a [2+2]cycloaddition reaction is described. the reaction of achiral diphenyl ketene with chiral aldimines derivedfrom chiral 2, 3, 4, 6-tetra-o-acetyl-β-d-galactopyranosylamine, 2, 3, 4, 6-tetra-o-acetyl-β-dglucopyranosylamine and different benzaldehydes resulted in the formation of β-lactams as singlediastereo...
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Institute of Organic Chemistry, Romanian Academy, 202B Spl. Independentei, PO Box 35-108, 060023 Bucharest, Romania; E-mail: *[email protected]; **[email protected] “Metathesis in Natural Product Synthesis” subtitled ‘Strategies, Substrates and Catalysts’ benefits from a foreword by Robert H. Grubbs, joint recipient of the 2005 Nobel Prize in Chemistry for his work on the development of the...
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An enantioselective [3 + 2] annulation of donor–acceptor aziridines with aldehydes has been realized using a Nd(OTf)3/N,N0-dioxide/LiNTf2 catalyst system, providing various chiral cis-1,3-oxazolidines inmoderate to good yields with high levels of stereocontrol. A relay catalytic process is proposed where LiNTf2 promotes the formation of azomethine ylide intermediates, and a chiral Nd(III)–N,N0-...
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The Lycopodium alkaloids are a family of structurally complex natural products, which have provoked long-term interests in their total syntheses because of their unique and fascinating architectures and potential biological activities. In particular, fawcettimine-type Lycopodium alkaloids, such as fawcettimine (1) and fawcettidine (2) (Scheme 1), have attracted broad attention from the syntheti...
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A theoretical study of the kinetics and mechanism of second-order intermolecular C.) cloadd it ion of 2-Ethyny1-2,3-Dihydrofurane and Phenyl Azide was performed using DFT method at 101.111 le) cl of theory with 6-31 PrEG(d,p) basis set at 298.15K. Equilibrium molecular geometries and harmonic ) ihrational frequencies ofthe reactants, transition state, and product were calculated. The kinetic an...
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ژورنال
عنوان ژورنال: Beilstein Journal of Organic Chemistry
سال: 2020
ISSN: 1860-5397
DOI: 10.3762/bjoc.16.251