Waseda Institute for Advanced Study

Study, Japan

Waseda Institute for Advanced Study

Study, Japan
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Pan S.,Waseda University | Endo K.,Waseda Institute for Advanced Study | Shibata T.,Waseda University
Organic Letters | Year: 2012

A cationic Ir(I)-C 3-TUNEPHOS complex catalyzed an intermolecular hydroamination of styrene derivatives with various heteroaromatic amines. The reaction gave Markovnikov products with perfect regioselectivity and good enantioselectivity under solvent-free conditions. © 2012 American Chemical Society.


Endo K.,Waseda Institute for Advanced Study | Ohkubo T.,Waseda University | Hirokami M.,Waseda University | Shibata T.,Waseda University
Journal of the American Chemical Society | Year: 2010

The palladium-catalyzed Suzuki-Miyaura cross-coupling on a multisubstituted sp3-carbon in 1,1-diborylalkanes was achieved at room temperature. The generation of a monoborate intermediate by virtue of the adjacent B atom could result in the chemoselective coupling reaction under ambient conditions. © 2010 American Chemical Society.


Pan S.,Waseda University | Endo K.,Waseda Institute for Advanced Study | Shibata T.,Waseda University
Organic Letters | Year: 2011

A cationic Ir(I)-tolBINAP complex catalyzed an enantioselective C-C bond formation initiated by secondary sp 3 C-H bond cleavage adjacent to a nitrogen atom. The reaction of 2-(alkylamino)pyridines with various alkenes gave chiral amines in good yields with high enantiomeric excesses. © 2011 American Chemical Society.


Endo K.,Waseda Institute for Advanced Study | Endo K.,Japan Science and Technology Agency | Ohkubo T.,Waseda University | Shibata T.,Waseda University
Organic Letters | Year: 2011

The chemoselective Pd-catalyzed Suzuki-Miyaura cross-coupling reaction using a diborylmethane is reported. The use of an equimolar amount of base with a diborylmethane realized chemoselective coupling for the synthesis of various benzylboronate derivatives. Sterically hindered aryl bromides can give products in moderate to excellent yields. © 2011 American Chemical Society.


Endo K.,Waseda Institute for Advanced Study | Tanaka K.,Waseda University | Ogawa M.,Waseda University | Shibata T.,Waseda University
Organic Letters | Year: 2011

A multinuclear palladium catalyst can be used to realize the efficient catalytic asymmetric alkylative ring-opening reaction of oxabicyclic alkenes using dimethylzinc. The use of (R)-BINOL-PHOS bearing bisphosphine and diol moieties is essential for achieving excellent catalytic performance; the corresponding monophosphine and hydroxy-protected derivatives showed lower catalytic activities and/or enantioselectivities. The generation of Pd/Zn-multinuclear complexes is a key feature of the present catalysis.(Figure Presented) © 2011 American Chemical Society.


Shibata T.,Waseda University | Uchiyama T.,Waseda University | Yoshinami Y.,Waseda University | Takayasu S.,Waseda University | And 2 more authors.
Chemical Communications | Year: 2012

Silahelicenes, which contain two silole moieties in a helically chiral structure, were synthesized by a chiral Ir-catalyzed intermolecular [2+2+2] cycloaddition of tetraynes with diynes along with a Ni-mediated intramolecular [2+2+2] cycloaddition. The photophysical properties of the obtained highly enantiomerically enriched silahelicenes (up to 93% ee) were also measured. © The Royal Society of Chemistry 2012.


Stienen B.M.C.,University of Tilburg | Tanaka A.,Waseda Institute for Advanced Study | de Gelder B.,University of Tilburg | de Gelder B.,Harvard University
PLoS ONE | Year: 2011

Multisensory integration may occur independently of visual attention as previously shown with compound face-voice stimuli. We investigated in two experiments whether the perception of whole body expressions and the perception of voices influence each other when observers are not aware of seeing the bodily expression. In the first experiment participants categorized masked happy and angry bodily expressions while ignoring congruent or incongruent emotional voices. The onset between target and mask varied from -50 to +133 ms. Results show that the congruency between the emotion in the voice and the bodily expressions influences audiovisual perception independently of the visibility of the stimuli. In the second experiment participants categorized the emotional voices combined with masked bodily expressions as fearful or happy. This experiment showed that bodily expressions presented outside visual awareness still influence prosody perception. Our experiments show that audiovisual integration between bodily expressions and affective prosody can take place outside and independent of visual awareness. © 2011 Stienen et al.


Kamide N.,Waseda Institute for Advanced Study
ICAART 2010 - 2nd International Conference on Agents and Artificial Intelligence, Proceedings | Year: 2010

It is known that linear-time temporal logic (LTL) is one of the most useful logics for reasoning about time and for verifying concurrent systems. It is also known that the satisfiability problem for LTL is PSPACE-complctc and that finding NP-complete fragments of LTL is an important issue for constructing efficiently executable temporal logics. In this paper, an alternative NP-complete logic called bounded linear-time temporal logic is obtained from LTL by restricting the time domain of temporal operators.


Kamide N.,Waseda Institute for Advanced Study
ICAART 2010 - 2nd International Conference on Agents and Artificial Intelligence, Proceedings | Year: 2010

A new temporal logic called linear-time computation tree logic (LCTL) is obtained from computation tree logic (CTL) by adding some modified versions of the temporal operators of linear-time temporal logic (LTL). A theorem for embedding LCTL into CTL is proved. The model-checking, validity and satisfiability problems of LCTL are shown to be deterministic PTIME-complete, EXPTIME-complete and deterministic EXPTIME-complete, respectively.


Kamijo Y.,Waseda Institute for Advanced Study
Theory and Decision | Year: 2013

We study the stable standard of behavior in a perfect foresight situation that was introduced by Xue (Econ Theory 11:603-627, 1998). We assume that the inducement relations are invertible and coalition free. We show that the conditions are sufficient for the existence of the nonempty-valued optimistic/conservative stable standard of behavior for perfect foresight situation (OSSB-PF/CSSB-PF). Moreover, we find that an OSSB-PF supports a Pareto-efficient outcome as a stable outcome; if the preference relations are strict, only the Pareto-efficient outcomes are supported by the OSSB-PF. © 2012 Springer Science+Business Media New York.

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