Template-directed photochemical [2+2] cycloaddition within discrete assemblies
نویسندگان
چکیده
منابع مشابه
Template directed reversible photochemical ligation of oligodeoxynucleotides.
We demonstrated that 5-vinyldeoxyuridine ((V)U) and 5-carboxyvinyldeoxyuridine ((CV)U) can be used to photoligate a longer oligonucleotide (ODN) from smaller ODNs on a template. By performing irradiation at 366 nm, these artificial nucleotides make photoligated ODNs with high efficiency without any side reactions. Moreover, by performing irradiation at 312 nm, these photoligated ODNs were rever...
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Co-crystallization of 1,8-naphthalenedicarboxylic acid (1,8-nap) with trans-1,2-bis(n-pyridyl)ethylene (n,n'-bpe) (n = 2 or 4) yields a discrete four-component molecular assembly, 2(n,n'-bpe).2(1,8-nap) 1, that is held together by four O-H...N hydrogen bonds where the dicarboxylic acid, serving as a linear template, directs alignment of olefins in the solid state for [2 + 2] photoreaction.
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[reaction: see text] A template containing two secondary dialkylammonium ion recognition sites for encirclement by olefin-bearing dibenzo[24]crown-8 derivatives has been used to promote olefin cross metatheses with ruthenium-alkylidene catalysts. For monoolefin monomers, the rates of metatheses and yields of the dimers are both amplified in the presence of the template. Likewise, for a diolefin...
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Novel photocatalysts based on ruthenium complexes with NHC (N-heterocyclic carbene)-type bridging ligands have been prepared and structurally and photophysically characterised. The identity of the NHC-unit of the bridging ligand was established unambiguously by means of X-ray structural analysis of a heterodinuclear ruthenium-silver complex. The photophysical data indicate ultrafast intersystem...
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of a collaboration between the synthetic capacities of Massachusetts Institute of Technology multiple polymerases. Two types of polymerases are Cambridge, Massachusetts 02139 required: primases, which start chains, and replicative polymerases, which synthesize the majority of the DNA (Kornberg and Baker, 1992). The replication fork, how-Synthesis of all genomic DNA involves the highly coordi-ev...
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ژورنال
عنوان ژورنال: SCIENTIA SINICA Chimica
سال: 2017
ISSN: 1674-7224
DOI: 10.1360/n032017-00025