4 article(s) from Konno, Tsutomu
- Full Research Paper
- Published 29 May 2020
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Figure 1: (A) Transition-metal-containing and (B) pure organic phosphorescent materials reported thus far (bp...
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Figure 2: (A) Chemical structures of fluorescent bistolane derivatives previously developed by our group and ...
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Scheme 1: Synthetic pathway for fluorinated benzil (2) and bisbenzil (3) derivatives.
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Scheme 2: Proposed mechanism of Pd(II)-catalyzed alkyne oxidation by dimethyl sulfoxide (DMSO).
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Figure 3: Mulliken charge distributions of fluorinated 1a and nonfluorinated 1c obtained from density functio...
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Figure 4: Absorption and photoluminescence (PL) spectra of (A) 2a, (B) 2b, (C) 3a, (D) 3b, and (E) 3c in tolu...
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Figure 5: Distributions of molecular orbitals (isosurface value: 0.04 a.u.) involved in vertical electronic t...
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- Full Research Paper
- Published 11 Sep 2018
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Figure 1: Functional molecules with CF2CF2-fragment.
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Scheme 1: Preparation and synthetic applications of 2-Zn.
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Figure 2: Recovery yield of 2-Zn in DMF (ca. 0.70 M) after stirring at various temperature conditions.
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Figure 3: Copper(I)-catalyzed cross-coupling reaction of 2-Zn with various iodoarene derivatives. NMR (isolat...
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Scheme 2: Multigram-scale cross-coupling of 2-Zn with iodoarenes.
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Scheme 3: Synthesis of a CF2CF2 group containing tolane derivative.
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Figure 4: Copper(I)-catalyzed cross-coupling reaction of 2-Zn with various acid chlorides. NMR yields (isolat...
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- Full Research Paper
- Published 15 Jan 2018
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Figure 1: Typical examples of previously reported negative-type liquid crystals containing a CF2CF2-carbocycl...
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Scheme 1: Improved short-step synthetic protocol for multicyclic mesogens 1 and 2.
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Scheme 2: Short-step approach to CF2CF2-containing carbocycles.
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Figure 2: (a) Expected products of over-reaction in the Grignard reaction of dimethyl tetrafluorosuccinate (7...
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Scheme 3: Mechanism for the reaction of γ-keto ester 6 with vinyl Grignard reagents.
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Scheme 4: First multigram-scale preparation of CF2CF2-containing multicyclic mesogens.
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Scheme 5: Stereochemical assignment of the ring-closing metathesis products.
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- Letter
- Published 19 Dec 2012
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Figure 1: trans-Enediyne.
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Scheme 1: Synthetic strategy for the preparation of trifluoromethylated diynes.
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Scheme 2: Preparation of various enynes.
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Figure 2: Regio- and stereoisomers.
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Scheme 3: A proposed reaction mechanism.
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Scheme 4: Synthesis of trans-enediynes. aDetermind by 19F NMR. Values in parentheses are of isolated yield.
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