Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Chitaru Hirosawa"'
Autor:
Khalil A. Abboud, Marie E. Krafft, Kimberly A. Seibert, James A. Wright, John W. Cran, Chitaru Hirosawa, Thomas F. N. Haxell
Publikováno v:
Tetrahedron. 67:9922-9943
From the initial development of a homologous Morita–Baylis–Hillman reaction utilizing epoxides as electrophiles, the method was expanded to enable the exclusively organocatalyzed intramolecular allylation of enones and to develop the intramolecul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c11f896be736e6be975af36d46fed84e
https://doi.org/10.1016/j.tet.2011.09.061
https://doi.org/10.1016/j.tet.2011.09.061
Autor:
Khalil A. Abboud, Nathalie L'Helias, Peter Schmidt, Graham M. Kyne, Marie E. Krafft, Chitaru Hirosawa
Publikováno v:
Tetrahedron. 62:11782-11792
Tricyclic skeletons have been generated from acyclic enyne precursors by using an intramolecular Pauson–Khand reaction in combination with aldol, Michael and alkylation reactions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::040aedcf06df9f15d56136bc7b3d345c
https://doi.org/10.1016/j.tet.2006.09.022
https://doi.org/10.1016/j.tet.2006.09.022
Publikováno v:
The Journal of Organic Chemistry. 68:6039-6042
High levels of diastereoselection were achieved in the PKR of 1,6- and 1,7-cyclopropylidenynes bearing a bulky propargylic C(2)-symmetric acetal.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::da8665ed0d020e9b0439041222de3e7f
https://doi.org/10.1021/jo0263667
https://doi.org/10.1021/jo0263667
Publikováno v:
Tetrahedron Letters. 42:7733-7736
Homocoupling of terminal alkynes proceeds using Co2(CO)8 pretreated with phenanthroline to give good yields of 1,3-diynes under mild conditions.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::180cf6d5d35755a1967cab8ecc9e6303
https://doi.org/10.1016/s0040-4039(01)01701-4
https://doi.org/10.1016/s0040-4039(01)01701-4
Publikováno v:
The Journal of Organic Chemistry. 66:3004-3020
In this report we have shown that the commercially available Co(2)(CO)(8) and Co(4)(CO)(12), and enyne--Co(2)(CO)(6) complexes, are sufficiently effective in catalyzing the Pauson--Khand reaction under one atmosphere of CO pressure. It was further de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::775d396642c62d3c4fc99b1c741515b0
https://doi.org/10.1021/jo0057708
https://doi.org/10.1021/jo0057708
Publikováno v:
Tetrahedron Letters. 40:9171-9175
The difficult and impractical purification of Co 2 (CO) 8 is not necessary in the catalytic thermal Pauson-Khand reaction previously described by Livinghouse.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31bfcb52a39c2dccc5b4616ba6a2d559
https://doi.org/10.1016/s0040-4039(99)01960-7
https://doi.org/10.1016/s0040-4039(99)01960-7
Publikováno v:
Tetrahedron Letters. 40:9177-9181
Dicobalt hexacarbonyl complexes of enynes serve as Co2(CO)8 surrogates for the intramolecular Pauson-Khand cycloaddition. Enynes with polar functional groups allow for easy separation of the catalyst cyclopentenone by-product (acid or base wash, sili
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::717676c6c75d1ec9756e70ce3c80654b
https://doi.org/10.1016/s0040-4039(99)01959-0
https://doi.org/10.1016/s0040-4039(99)01959-0
Publikováno v:
Tetrahedron Letters. 37:6749-6752
Hydrogenation of amides can be catalyzed by bimetallic systems. which consist of Group 8 to 10 late transition-metals and Group 6 or 7 early transition-metals. under the mild conditions to afford the corresponding amines selectively in good to excell
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::960e4861e78259ab98c5a82971935065
https://doi.org/10.1016/s0040-4039(96)01458-x
https://doi.org/10.1016/s0040-4039(96)01458-x
Publikováno v:
Tetrahedron. 50:8997-9008
In chiral alcohols bearing a phenylthio group at the β carbon atom. the hydroxy group is replaced by nitriles through the anchimeric assistance of the phenylthio group to afford chiral amides with retention of configuration. This stereospecific Ritt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccdc63165fbb379060d6a976f4442ff6
https://doi.org/10.1016/s0040-4020(01)85367-9
https://doi.org/10.1016/s0040-4020(01)85367-9
Publikováno v:
ChemInform. 23
Carbonyl compounds having asymmetric carbon center at β position and phenylthio group on γ carbon were produced by the reaction of optically active 2-hydroxyalkyl phenyl sulfides with enol silyl ethers in the presence of Lewis acid through “chira
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a54a106b485583770b78b7db8d4b3e94
https://doi.org/10.1002/chin.199250149
https://doi.org/10.1002/chin.199250149