Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Yeun Min Tsai"'
Publikováno v:
Journal of Chemical Education. 90:1296-1302
The purpose of this study was to develop a scoring rubric to assess students’ manipulation skills and identify students’ learning difficulties in conducting organic chemistry experiments. In constructing the scoring rubric, we first analyzed the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c33c749639af1d8817cfc8cb9e643510
https://doi.org/10.1021/ed101111g
https://doi.org/10.1021/ed101111g
Autor:
Yeun-Min Tsai, Ming-Jen Chen
Publikováno v:
Tetrahedron. 67:1564-1574
Radical cyclization of acylsilane is an useful synthetic methodology. To demonstrate the versatility of this method using the cyclization as a key step, polyhydroxylated indolizidine (+)-swainsonine was synthesized through two different bond connecti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::770f868ad3599e4a2abfb03ac38cb954
https://doi.org/10.1016/j.tet.2010.12.048
https://doi.org/10.1016/j.tet.2010.12.048
Publikováno v:
Tetrahedron Letters. 50:3805-3808
A convenient way for the synthesis of acylsilanes from arabinose, lyxose, and ribose is developed. All the chiral centers of the carbohydrate templates are conserved, and only the reducing end is transformed into the acylsilane functional group. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd35b926812cf02f8875be59cf526a70
https://doi.org/10.1016/j.tetlet.2009.04.032
https://doi.org/10.1016/j.tetlet.2009.04.032
Autor:
Ming-Jen Chen, Yeun-Min Tsai
Publikováno v:
Tetrahedron Letters. 48:6271-6274
Acylsilanes with latent α-acylamino radical functionality were prepared from different chiral templates. Radical cyclizations of these acylsilanes efficiently constructed polyhydroxylated indolizidine derivatives with excellent stereoselectivity at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03d29139cf367972c03b596c77bb92f9
https://doi.org/10.1016/j.tetlet.2007.07.021
https://doi.org/10.1016/j.tetlet.2007.07.021
Autor:
Yeun-Min Tsai, Luis Otero, Leonides Sereno, Ken-Tsung Wong, José Natera, Tsyr-Yuan Hwu, Fernando Fungo, Nung-Sen Wang
Publikováno v:
Macromolecules. 40:4456-4463
We have synthesized a novel 9,9‘-spirobifluorene-cored donor−acceptor (D−A) bichromophore system in which the electron-donating (D) moieties are triphenylamine (TPA) and carbazole (CBZ) groups and the electron-withdrawing (A) moieties are 1,3,4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3210f787c6e29e54c40d59224607ab2c
https://doi.org/10.1021/ma070055m
https://doi.org/10.1021/ma070055m
Publikováno v:
Chemical communications (Cambridge, England). 51(96)
The chiral selectivities were altered and high diastereo- and enantio-selectivities of the products were obtained in water medium without adding acid co-catalysts when a primary–tertiary diamine catalyst was immobilized on mesoporous SBA-15 to form
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::61212d06a99816714b139c3f5a7883f8
https://pubmed.ncbi.nlm.nih.gov/26451656
https://pubmed.ncbi.nlm.nih.gov/26451656
Publikováno v:
Tetrahedron. 61:2037-2045
Radical cyclizations of acylsilanes with radicalphilic pendant introduced on silicon proceeded in a tandem fashion to give spiro products containing a cyclic silyl ether skeleton. Because the alkoxysilyl group can be replaced with a hydroxy group thr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::626a5996f5943c33da855ff3aac1ee59
https://doi.org/10.1016/j.tet.2004.12.053
https://doi.org/10.1016/j.tet.2004.12.053
Publikováno v:
Tetrahedron Letters. 45:3047-3050
Formal total synthesis of (+)-heliotridine ( 4 ) and total synthesis of (−)-retronecine ( 5 ) were accomplished by using ( S )-3-acetoxysuccinimide ( 6 ) as the common starting material. The stereogenic center of 6 ended up as C-1 in both alkaloids
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::234909dff1f544205be4cf64f53c2149
https://doi.org/10.1016/j.tetlet.2004.02.097
https://doi.org/10.1016/j.tetlet.2004.02.097
Publikováno v:
The Journal of Organic Chemistry. 66:8983-8991
Acylsilanes with terminal alpha-stannyl bromide or xanthate functionalities are prepared. Alpha-stannyl radicals generated from these acylsilanes undergo intramolecular cyclizations to give cyclic silyl enol ethers regiospecifically. The radical proc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bae9af16962f652689ba260493f8395b
https://doi.org/10.1021/jo010883s
https://doi.org/10.1021/jo010883s
Publikováno v:
Tetrahedron Letters. 41:3911-3914
The reactions of acylsilanes with N-(phenylthio)succinimide in the presence of p-toluenesulfonic acid in acetonitrile give α-sulfenylated acylsilanes in good yields. Aldehydes with α-alkyl substituent afford moderate yields of α-sulfenylated produ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb00ea9929cf4d864a6c2f06799f071b
https://doi.org/10.1016/s0040-4039(00)00515-3
https://doi.org/10.1016/s0040-4039(00)00515-3