start-ver=1.4
cd-journal=joma
no-vol=21
cd-vols=
no-issue=17
article-no=
start-page=6756
end-page=6760
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2019
dt-pub=20190808
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Rhenium-Catalyzed Cyclization via 1,2-Iodine and 1,5-Hydrogen Migration for the Synthesis of 2-Iodo-1H-indenes
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=A rhenium complex catalyzed the formation of 2-iodo-1H-indene derivatives through iodine and hydrogen migration of 3-iodopropargyl ethers. The reaction proceeded via generation of 1-iodoalkenylrhenium carbene species by sequential 1,2-iodine and 1,5-hydrogen shifts with readily available precursors under neutral conditions. The reaction mechanism and the reactivity of the generated alkenylcarbene species were also investigated.
en-copyright=
kn-copyright=

en-aut-name=MuraiMasahito
en-aut-sei=Murai
en-aut-mei=Masahito
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=TakaiKazuhiko
en-aut-sei=Takai
en-aut-mei=Kazuhiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

affil-num=1
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
en-keyword=anti-markovnikov addition
kn-keyword=anti-markovnikov addition
en-keyword=silyl enol ethers
kn-keyword=silyl enol ethers
en-keyword=terminal alkynes
kn-keyword=terminal alkynes
en-keyword=metal vinylidenes
kn-keyword=metal vinylidenes
en-keyword=cycloisomerization
kn-keyword=cycloisomerization
en-keyword=ruthenium
kn-keyword=ruthenium
en-keyword=complexes
kn-keyword=complexes
en-keyword=derivatives
kn-keyword=derivatives
en-keyword=carbene
kn-keyword=carbene
en-keyword=functionalization
kn-keyword=functionalization
END

start-ver=1.4
cd-journal=joma
no-vol=21
cd-vols=
no-issue=9
article-no=
start-page=3441
end-page=3445
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2019
dt-pub=20190418
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Rhenium-Catalyzed Regioselective ortho-Alkenylation and [3 + 2 + 1] Cycloaddition of Phenols with Internal Alkynes
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=An operationally simple and direct rhenium-catalyzed ortho-alkenylation (C-alkenylation) of unprotected phenols with alkynes was developed. The protocol provided ortho-alkenylphenols exclusively, and formation of para- or multiply alkenylated phenols and hydrophenoxylation (O-alkenylation) products were not observed. The [3 + 2 + 1] cycloaddition of phenols and two alkynes via ortho-alkenylation was also demonstrated, in which the alkynes functioned as both two- and one-carbon units. These reactions proceeded with readily available starting materials under neutral conditions without additional ligands.
en-copyright=
kn-copyright=

en-aut-name=MuraiMasahito
en-aut-sei=Murai
en-aut-mei=Masahito
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=YamamotoMasaki
en-aut-sei=Yamamoto
en-aut-mei=Masaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=TakaiKazuhiko
en-aut-sei=Takai
en-aut-mei=Kazuhiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

affil-num=1
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=3
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
en-keyword=anti-markovnikov addition
kn-keyword=anti-markovnikov addition
en-keyword=intramolecular hydroarylation
kn-keyword=intramolecular hydroarylation
en-keyword=oxidative annulation
kn-keyword=oxidative annulation
en-keyword=gold
kn-keyword=gold
en-keyword=hydrophenoxylation
kn-keyword=hydrophenoxylation
en-keyword=construction
kn-keyword=construction
en-keyword=cyclization
kn-keyword=cyclization
en-keyword=vinylation
kn-keyword=vinylation
en-keyword=alkenes
kn-keyword=alkenes
END

start-ver=1.4
cd-journal=joma
no-vol=21
cd-vols=
no-issue=8
article-no=
start-page=2668
end-page=2672
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2019
dt-pub=20190404
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Chromium-Mediated Stannylcyclopropanation of Alkenes with (Diiodomethyl)stannanes
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=A stannyl-group-substituted gem-dichromiomethane species, generated in situ from CrCl2, TMEDA, and tributyl(diiodomethyl)stannane, worked as an efficient stannylcarbene equivalent to promote cyclopropanation of alkenes. The reaction provided synthetically useful stannylcyclopropanes directly from commercially available unactivated alkenes without using potentially flammable alkylzinc and diazo compounds. Structural characterization of stannyl- and germyl-group-substituted gem-dichromiomethane complexes and the effect of group 14 elements containing substituents for cyclopropanation are also described.
en-copyright=
kn-copyright=

en-aut-name=MuraiMasahito
en-aut-sei=Murai
en-aut-mei=Masahito
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=TaniguchiRyuji 
en-aut-sei=Taniguchi
en-aut-mei=Ryuji 
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=MizutaChisato
en-aut-sei=Mizuta
en-aut-mei=Chisato
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=TakaiKazuhiko
en-aut-sei=Takai
en-aut-mei=Kazuhiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

affil-num=1
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=3
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=4
en-affil=Graduate School of Natural Science and Technology, Okayama University
kn-affil=
en-keyword=chromium(II)-mediate synthesis
kn-keyword=chromium(II)-mediate synthesis
en-keyword=stereoselective-synthesis
kn-keyword=stereoselective-synthesis
en-keyword=e-alkenylstannanes
kn-keyword=e-alkenylstannanes
en-keyword=redox system
kn-keyword=redox system
en-keyword=cyclopropanation
kn-keyword=cyclopropanation
en-keyword=aldehydes
kn-keyword=aldehydes
en-keyword=reagents
kn-keyword=reagents
en-keyword=cyclopropenes
kn-keyword=cyclopropenes
en-keyword=reactivity
kn-keyword=reactivity
en-keyword=reduction
kn-keyword=reduction
END

start-ver=1.4
cd-journal=joma
no-vol=25
cd-vols=
no-issue=66
article-no=
start-page=15189
end-page=15197
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2019
dt-pub=20190918
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Mechanistic Insights into Rhenium-Catalyzed Regioselective C-Alkenylation of Phenols with Internal Alkynes
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract= A (μ-aryloxo)rhenium complex was isolated and confirmed as a key precatalyst for rhenium-catalyzed ortho-alkenylation (C-alkenylation) of unprotected phenols with alkynes. The reaction exclusively provided ortho-alkenylphenols; the formation of para or multiply alkenylated phenols and hydrophenoxylation (O-alkenylation) products was not observed. Several mechanistic experiments excluded a classical Friedel-Crafts-type mechanism, leading to the proposed phenolic hydroxyl group assisted electrophilic alkenylation as the most plausible reaction mechanism. For this purpose, the use of rhenium, a metal between the early and late transition metals in the periodic table, was key for the activation of both the soft carbon-carbon triple bond of the alkyne and the hard oxygen atom of the phenol, at the same time. ortho-Selective alkenylation with allenes also provided the corresponding adducts with a substitution pattern different from that obtained by the addition reaction with alkynes.
en-copyright=
kn-copyright=

en-aut-name=MuraiMasahito
en-aut-sei=Murai
en-aut-mei=Masahito
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=YamamotoMasaki
en-aut-sei=Yamamoto
en-aut-mei=Masaki
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=TakaiKazuhiko
en-aut-sei=Takai
en-aut-mei=Kazuhiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

affil-num=1
en-affil=Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=3
en-affil=Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=
en-keyword=alkenylation
kn-keyword=alkenylation
en-keyword=homogeneous catalysis
kn-keyword=homogeneous catalysis
en-keyword=reaction mechanisms
kn-keyword=reaction mechanisms
en-keyword=regioselectivity
kn-keyword=regioselectivity
en-keyword=rhenium
kn-keyword=rhenium
END

start-ver=1.4
cd-journal=joma
no-vol=8
cd-vols=
no-issue=6
article-no=
start-page=5454
end-page=5459
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2018
dt-pub=20180504
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Amine-Promoted anti-Markovnikov Addition of 1,3-Dicarbonyl Compounds with Terminal Alkynes under Rhenium Catalysis
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract=Amines have been identified to greatly accelerate the intermolecular anti-Markovnikov addition of carbon nucleophiles to unactivated terminal alkynes. Using a combination of [ReBr(CO)3(thf)]2 and iPr2NEt, construction of cyclic all-carbon quaternary centers was achieved with various 1,3-ketoesters, diketones, and diesters with lower catalyst loading under milder conditions. The type of addition could be easily controlled by choice of additive, highlighting the unique features of rhenium catalysis
en-copyright=
kn-copyright=

en-aut-name=MuraiMasahito
en-aut-sei=Murai
en-aut-mei=Masahito
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=UemuraErika
en-aut-sei=Uemura
en-aut-mei=Erika
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=TakaiKazuhiko
en-aut-sei=Takai
en-aut-mei=Kazuhiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

affil-num=1
en-affil=Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=3
en-affil=Division of Applied Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=
en-keyword=rhenium
kn-keyword=rhenium
en-keyword=anti-Markovnikov addition
kn-keyword=anti-Markovnikov addition
en-keyword=1,3-dicarbonyl compound
kn-keyword=1,3-dicarbonyl compound
en-keyword=vinylidene
kn-keyword=vinylidene
en-keyword=amine
kn-keyword=amine
END

start-ver=1.4
cd-journal=joma
no-vol=18
cd-vols=
no-issue=17
article-no=
start-page=4380
end-page=4383
dt-received=
dt-revised=
dt-accepted=
dt-pub-year=2016
dt-pub=20160811
dt-online=
en-article=
kn-article=
en-subject=
kn-subject=
en-title=
kn-title=Synthesis and Properties of Sila[n]helicenes via Dehydrogenative Silylation of C-H Bonds under Rhodium Catalysis
en-subtitle=
kn-subtitle=
en-abstract=
kn-abstract= Use of a rhodium catalyst with (R)-(S)-BPPFA ligand allows efficient synthesis of sila[n]helicenes via dehydrogenative silylation of C-H bonds. By selecting the proper ligands, the current method provides the ability to prepare unsymmetrical sila[n]helicene derivatives without any oxidants. The resulting sila[6]helicene is a rare example of a five-membered ring-fused [6]helicene, which was isolated as a single pure enantiomer without substituents on the terminal benzene rings.
en-copyright=
kn-copyright=

en-aut-name=MuraiMasahito
en-aut-sei=Murai
en-aut-mei=Masahito
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=1
ORCID=

en-aut-name=OkadaRyo
en-aut-sei=Okada
en-aut-mei=Ryo
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=2
ORCID=

en-aut-name=NishiyamaAtsushi
en-aut-sei=Nishiyama
en-aut-mei=Atsushi
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=3
ORCID=

en-aut-name=TakaiKazuhiko
en-aut-sei=Takai
en-aut-mei=Kazuhiko
kn-aut-name=
kn-aut-sei=
kn-aut-mei=
aut-affil-num=4
ORCID=

affil-num=1
en-affil=Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=2
en-affil=Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=3
en-affil=Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=

affil-num=4
en-affil=Division of Applied Chemistry, Graduate School of Natural Science and Technology, Okayama University
kn-affil=
END