Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Janagiraman Krishnamurthi"'
Publikováno v:
ARKIVOC, Vol 2005, Iss 11, Pp 146-160 (2005)
Externí odkaz:
https://doaj.org/article/ee7627eb6e8045798d78f34f486338c5
Autor:
Hisanori Nambu, Shunichi Hashimoto, Ryosuke Namie, Hitomi Miyamae, Motoki Ito, Janagiraman Krishnamurthi, Koji Takeda
Publikováno v:
Synlett. 25:288-292
An asymmetric total synthesis of (–)-trans-blechnic acid, a dihydrobenzofuran neolignan, has been achieved. The key steps involve an elaboration of the cis-2,3-dihydrobenzofuran core structure by enantio- and diastereoselective intramolecular C–H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22317410a4df08a4c9c974619cc12f97
https://doi.org/10.1055/s-0033-1340291
https://doi.org/10.1055/s-0033-1340291
Autor:
Shunichi Hashimoto, Tadashi Oohara, Janagiraman Krishnamurthi, Hisanori Nambu, Naoyuki Shimada
Publikováno v:
Organic Letters. 13:6284-6287
The first example of enantioselective intermolecular cycloaddition of carbonyl ylides with indoles is described. The cycloaddition of five- and six-membered carbonyl ylides derived from diazodiketoesters with N-methylindoles under catalysis by dirhod
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::193dd622214d4a3a576f359b0648ca80
https://doi.org/10.1021/ol2027625
https://doi.org/10.1021/ol2027625
Autor:
Sengodagounder Muthusamy, Janagiraman Krishnamurthi, Chinnakuzhanthai Gangadurai, Eringathodi Suresh
Publikováno v:
Tetrahedron. 67:4212-4220
Titanium(IV) chloride and silyl reagents mediated regio- and chemoselective ring opening reactions of oxa-bridged piperidinone ring systems were demonstrated. This methodology interestingly undergoes the stereoselective ring opening at the C–O bond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2157d9ab058cf2a2eadd0230138a030c
https://doi.org/10.1016/j.tet.2011.04.049
https://doi.org/10.1016/j.tet.2011.04.049
Autor:
Hisanori Nambu, Naoyuki Shimada, Shunichi Hashimoto, Janagiraman Krishnamurthi, Mayuka Hikime, Megumi Kamiya
Publikováno v:
Tetrahedron Letters. 50:3675-3678
This Letter describes asymmetric tandem carbonyl ylide formation–intramolecular 1,3-dipolar cycloaddition reaction of diazo imides containing a tethered indole catalyzed by chiral dirhodium(II) carboxylates as an approach to the pentacyclic skeleto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d35a2e52f6f283f05cfa02dc58de35b3
https://doi.org/10.1016/j.tetlet.2009.03.142
https://doi.org/10.1016/j.tetlet.2009.03.142
Autor:
Srinivasarao Arulananda Babu, Sengodagounder Muthusamy, Janagiraman Krishnamurthi, Eringathodi Suresh
Publikováno v:
The Journal of Organic Chemistry. 72:1252-1262
A series of symmetrical and unsymmetrical alpha,beta-unsaturated ketones such as arylmethylidenecycloalkanones (16, 19), bis(arylmethylidene)cycloalkanones (21, 23, 27), bisdiphenylnonatetraenones (30), and bis(phenylpropenylidene)cycloalkanones (33,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::291ca00f5de217aa95f09f6b61a66d1d
https://doi.org/10.1021/jo0621726
https://doi.org/10.1021/jo0621726
Publikováno v:
Tetrahedron Letters. 45:6485-6488
Bis- as well as tris-tetrahydropyranone ring systems were obtained via multiple tandem cyclization–1,3-dipolar cycloaddition reactions of a-diazo ketones with ketone as well as aldehyde functional groups in a chemoselective manner.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5603e31bab6d628dc85acd65cbbf4f8f
https://doi.org/10.1016/j.tetlet.2004.06.119
https://doi.org/10.1016/j.tetlet.2004.06.119
Autor:
Motoki Ito, Hisanori Nambu, Shunichi Hashimoto, Ryosuke Namie, Hitomi Miyamae, Janagiraman Krishnamurthi, Koji Takeda
Publikováno v:
ChemInform. 45
(-)-trans-blechnic acid (I) has an uncommon 2,3-cis-stereochemistry and belongs to the dihydrobenzofuran neolignans, which exhibit several biological activities.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::272c4dabbd825d2f3e94288ceb08d66a
https://doi.org/10.1002/chin.201428227
https://doi.org/10.1002/chin.201428227
Autor:
Masahiro Anada, Janagiraman Krishnamurthi, Koji Takeda, Akihito Yamano, Hisanori Nambu, Shunichi Hashimoto
Publikováno v:
ChemInform. 44
The first catalytic asymmetric cycloaddition of carbonyl ylides, derived from diazoketoesters (I), with arylallenes (II) proceeds in a fully chemo- and regioselective manner to give 8-oxabicyclo[3.2.1]octanes (III) (18 examples) with excellent enanti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b4cab6082a665773bc7a146175d521e
https://doi.org/10.1002/chin.201350026
https://doi.org/10.1002/chin.201350026
Publikováno v:
ChemInform. 43
The first catalytic asymmetric hetero-Diels—Alder reaction between 2-aza-3-siloxybutadienes and aldehydes is achieved using a complex dirhodium (II) catalyst.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f8d030f9710f27b7b220a25a4667a7ba
https://doi.org/10.1002/chin.201245027
https://doi.org/10.1002/chin.201245027