Diversity-oriented approach to linearly fused spirocycles via strategic utilization of a [2+2+2] cycloaddition and the Diels–Alder reaction
摘要:
We have demonstrated a simple and an efficient protocol for assembling a library of linearly fused spirocycles in a diversity-oriented manner by utilizing two sequential atom-economic reactions such as a [2+2+2] cycloaddition and the Diels-Alder (DA) reaction. Herein, we have used rongalite for the formation of sultine derivatives, which are useful latent diene equivalents suitable for the DA sequence to generate a library of polycycles under mild reaction conditions. (C) 2015 Elsevier Ltd. All rights reserved.
The de novo synthesis of an aromatic system via [2+2+2] alkyne cyclotrimerization provided access to a fluorenyl spiro-annelated phthalic anhydride derivative. Its exceptional rigidity - originating from the orthogonally attached fluorenyl moiety - was confirmed by single-crystal X-ray analysis. The anhydride was used successfully as a precursor for the synthesis of a novel class of orthogonal spiro-annelated Zn-phthalocyanine, which has the potential to be used as a core for molecular architecture.
Molybdenum hexacarbonyl: air stable catalyst for microwave assisted intermolecular [2+2+2] co-trimerization involving propargyl halides
作者:Sambasivarao Kotha、Gaddamedi Sreevani
DOI:10.1016/j.tetlet.2015.09.029
日期:2015.10
Intermolecular [2+2+2] cycloaddition of propargyl halides with 1,6-diynes was achieved with air stable, catalytic amount of Mo(CO)(6) and the benzyl halide derivatives were isolated in good yields. The reaction conditions were optimized and better yields were observed under microwave irradiation conditions using acetonitrile as a solvent. (C) 2015 Elsevier Ltd. All rights reserved.
Diversity-oriented approach to linearly fused spirocycles via strategic utilization of a [2+2+2] cycloaddition and the Diels–Alder reaction
作者:Sambasivarao Kotha、Rashid Ali
DOI:10.1016/j.tet.2015.01.009
日期:2015.3
We have demonstrated a simple and an efficient protocol for assembling a library of linearly fused spirocycles in a diversity-oriented manner by utilizing two sequential atom-economic reactions such as a [2+2+2] cycloaddition and the Diels-Alder (DA) reaction. Herein, we have used rongalite for the formation of sultine derivatives, which are useful latent diene equivalents suitable for the DA sequence to generate a library of polycycles under mild reaction conditions. (C) 2015 Elsevier Ltd. All rights reserved.