Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Kelvin H. Yong"'
Autor:
Shuwen He, Kelvin H. Yong, Tao Li, Jacob M. Janey, Juan D. Arredondo, Matthew D. Truppo, Jeffrey T. Kuethe
Publikováno v:
Tetrahedron. 70:4563-4570
A synthetically useful protocol has been developed for the preparation of highly functionalized piperidinyl ethers. Biocatalytic reduction of cyclhexanones 7, 10, and 14 allows for the preparation of both cis- and trans diastereomers with an extremel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b1d36f81098d946b608d1a123c66bdf
https://doi.org/10.1016/j.tet.2014.04.064
https://doi.org/10.1016/j.tet.2014.04.064
Autor:
J. Michael Chong, Kelvin H. Yong
Publikováno v:
Organic Letters. 4:4139-4142
Chiral organomagnesium amides (COMAs), readily prepared from dialkylmagnesiums and chiral secondary amines, can reduce trifluoromethyl ketones to form secondary alcohols with excellent enantioselectivities (up to 98:2 er) and chemical yields (typical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f96e3e5f87d1a820e24a78e8fd98ead3
https://doi.org/10.1021/ol026901p
https://doi.org/10.1021/ol026901p
Autor:
Jacob M. Janey, Tao Li, Shuwen He, Matthew D. Truppo, Juan D. Arredondo, Jeffrey T. Kuethe, Kelvin H. Yong
Publikováno v:
ChemInform. 45
A synthetically useful protocol has been developed for the preparation of highly functionalized piperidinyl ethers. Biocatalytic reduction of cyclhexanones 7, 10, and 14 allows for the preparation of both cis- and trans diastereomers with an extremel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0be0ebf2845dff458765c5e9a48a35d2
https://doi.org/10.1002/chin.201450148
https://doi.org/10.1002/chin.201450148
Publikováno v:
The Journal of Organic Chemistry. 63:9828-9833
α-Diazo ketones tethered to furan, benzofuran, thiophene, and benzothiophene by a single methylene spacer have been shown to undergo atypical, rhodium(II) acetate catalyzed chemistry. For example, while treatment of 1-diazo-3-(3-furanyl)-2-propanone
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::12fe73f5dbb9f9eb7fc434e40429660f
https://doi.org/10.1021/jo9814593
https://doi.org/10.1021/jo9814593
Publikováno v:
Tetrahedron Letters. 38:5081-5084
Treatment of 1-diazo-3-(2-thienyl)-2-propanone with catalytic rhodium (II) acetate results in cyclopropanation followed by acid-catalyzed ring opening and tautomerization to yield 5,6-dihydro-4H-cyclopenta[b]thiopen-5-one. Under the same conditions,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8181f8f3f8edc365f849724283cd7290
https://doi.org/10.1016/s0040-4039(97)01131-3
https://doi.org/10.1016/s0040-4039(97)01131-3
Publikováno v:
ChemInform. 28
Treatment of 1-diazo-3-(2-thienyl)-2-propanone with catalytic rhodium (II) acetate results in cyclopropanation followed by acid-catalyzed ring opening and tautomerization to yield 5,6-dihydro-4H-cyclopenta[b]thiopen-5-one. Under the same conditions,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd70f355a106a97b963cb896a8047f14
https://doi.org/10.1002/chin.199743123
https://doi.org/10.1002/chin.199743123
Publikováno v:
ChemInform. 30
α-Diazo ketones tethered to furan, benzofuran, thiophene, and benzothiophene by a single methylene spacer have been shown to undergo atypical, rhodium(II) acetate catalyzed chemistry. For example, while treatment of 1-diazo-3-(3-furanyl)-2-propanone
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a5b9c7ba151adff6d0d3c773fe5a214
https://doi.org/10.1002/chin.199922047
https://doi.org/10.1002/chin.199922047
Publikováno v:
ChemInform. 33
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cfbd545fd2eae28e0aea6a0a58287a2
https://doi.org/10.1002/chin.200221060
https://doi.org/10.1002/chin.200221060
Publikováno v:
Organic letters. 4(21)
[reaction: see text] Dialkylmagnesiums react with chiral secondary amines to form chiral organomagnesium amides (COMAs). These reagents alkylate aldehydes to form secondary alcohols with enantioselectivities up to 91:9 er.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6bcd123e983fdf3532adfeb6a4590a8
https://pubmed.ncbi.nlm.nih.gov/12375885
https://pubmed.ncbi.nlm.nih.gov/12375885
Autor:
Kelvin H. Yong, Kulwinder K. Flora, John D. Brennan, David A. Gerritsma, Alfredo Capretta, Amy Jones
Publikováno v:
Photochemistry and photobiology. 75(2)
The sensitization of Eu(III) and Tb(III) by ethylenediaminetetraaceticacid (EDTA)-derivatized tryptophan (Trp), 7-azatryptophan (7AW) and 5-hydroxytryptophan (5HW) has been examined. These Trp analogs were utilized in the present study because they c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5dd38c684be2a85fcb69b1451901583d
https://pubmed.ncbi.nlm.nih.gov/11883598
https://pubmed.ncbi.nlm.nih.gov/11883598