Differential Reactivity Pattern of Hybrid o-Quinodimethane Precursors: Strategic Expansion to Annulated Benzocycloalkanes via Rongalite
摘要:
A hybrid benzocyclobutene (BCB) molecular frames embedding sultine or sulfone moiety has been synthesized via utilization of rongalite. The selective Diels-Alder reaction has been realized at sultine or sulfone terminus in the hybrid BCB system to prepare functionalized BCB molecular frames. The methodology has been generalized for assembling various benzocycloalkanes containing a sultine unit and the strategy has been expanded to generate various annulated benzocycloalkanes.
benzocyclobutene-based α-aminoacidderivative, ethyl 5-acetamido-2,4,5,6-tetrahydro-1H-cyclobuta[f]indene-5-carboxylate is synthesized via coupling of a benzocyclobutene-derived dibromide with ethyl isocyanoacetate as the key step, followed by hydrolysis and subsequent acetylation. This methodology is generalized in order to prepare various linearly and angularly fused indane-based α-aminoacidderivatives. α-amino
Bodwell, Graham J.; Ernst, Ludger; Hopf, Henning, Chemische Berichte, 1990, vol. 123, # 12, p. 2381 - 2386
作者:Bodwell, Graham J.、Ernst, Ludger、Hopf, Henning、Jones, Peter G.、McNally, John P.、Schomburg, Dietmar
DOI:——
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Diversity-Oriented Approach to 1,2,3,4-Tetrahydroisoquinoline-3-carboxylic Acid (Tic) Derivatives Using Diethyl Acetamidomalonate as a Glycine Equivalent: Further Expansion by Suzuki–Miyaura Cross-Coupling Reaction
Synthesis of diverse 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (Tic) derivatives and its higher analogues are reported using diethyl acetamidomalonate as a glycine equivalent. In addition, various substituted Tic derivatives are assembled by application of Suzuki-Miyaura cross-coupling reaction as a key step.
Diversity-Oriented Approach to 1,2,3,4-Tetrahydroisoquinoline-3-carboxylic Acid (Tic) Derivatives
A convenient method is reported for synthesizing various 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid derivatives and bis-armed acid derivatives by treating dibromo-o-xylylenes precursor with diethyl acetamidomalonate under basic conditions. Suzuki coupling reaction has been to expand this methodology. One of the structure revision of 1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid into bis-armed amino acid is also reported.