A series of sodium 2-arylimino-8-quinolates,C1-C8,differing in both the nature of the aryl and quinolate substituents,was prepared and characterized by ^(1)H/^(13)C NMR spectroscopy and elemental analysis.Their X-ray ...A series of sodium 2-arylimino-8-quinolates,C1-C8,differing in both the nature of the aryl and quinolate substituents,was prepared and characterized by ^(1)H/^(13)C NMR spectroscopy and elemental analysis.Their X-ray structures reveal multimetallic assemblies adopting a variety of structural cores all based on Na-O repeat units:cubic and tetrametallic for C1,C2 and C4,hexagonal prismatic and hexametallic for C3 and C5,and for tetrametallic C7’a core resembling a cyclooctatetraene-type tub-shape.In the presence of BnOH,C1-C8 exhibit good activities towards the ring-opening polymerization(ROP)of rac-lactide,affording amorphous polylactides with broad molecular weight distributions.Furthermore,the substituent variation within the ligand frame of C1-C8 affects the catalytic activities of the ROP with the least sterically hindered system,C1,yielding the highest conversion.展开更多
Para-quinols(p-quinols)are a kind of cyclohexa-2,5-dienones,and are widely used as active synthons in organic synthesis,medicinal chemistry and materials science.Herein,the efficient synthesis of poly-substituted aren...Para-quinols(p-quinols)are a kind of cyclohexa-2,5-dienones,and are widely used as active synthons in organic synthesis,medicinal chemistry and materials science.Herein,the efficient synthesis of poly-substituted arenes and fused cyclic compounds from p-quinols has been summarized.The mecha-nisms and the key driving force of these efficient transformations have been discussed.展开更多
基金supported by the National Natural Science Foundation of China(no.51273202 and U1362204)the Chinese Academy of Sciences for a Visiting Scientist Fellowship.
文摘A series of sodium 2-arylimino-8-quinolates,C1-C8,differing in both the nature of the aryl and quinolate substituents,was prepared and characterized by ^(1)H/^(13)C NMR spectroscopy and elemental analysis.Their X-ray structures reveal multimetallic assemblies adopting a variety of structural cores all based on Na-O repeat units:cubic and tetrametallic for C1,C2 and C4,hexagonal prismatic and hexametallic for C3 and C5,and for tetrametallic C7’a core resembling a cyclooctatetraene-type tub-shape.In the presence of BnOH,C1-C8 exhibit good activities towards the ring-opening polymerization(ROP)of rac-lactide,affording amorphous polylactides with broad molecular weight distributions.Furthermore,the substituent variation within the ligand frame of C1-C8 affects the catalytic activities of the ROP with the least sterically hindered system,C1,yielding the highest conversion.
基金supported by the Department of Science and Technology of Jilin Province(20220402046GH,20220101066JC).
文摘Para-quinols(p-quinols)are a kind of cyclohexa-2,5-dienones,and are widely used as active synthons in organic synthesis,medicinal chemistry and materials science.Herein,the efficient synthesis of poly-substituted arenes and fused cyclic compounds from p-quinols has been summarized.The mecha-nisms and the key driving force of these efficient transformations have been discussed.
