Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Ling-Ling Tien"'
Publikováno v:
Journal of the Chinese Chemical Society. 40:385-391
In the presence of base, 3-subslituted 4-fonnyl- and 4-acetylsydnones decarbonylated to afford the corresponding 3-substituted sydnones. The Claisen-Schmidt reaction occurred between 3-substituted 4-for-mylsydnones and methyl ketone (such as 4-acetyl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cce5db58606e5f5f743013d0587f6a6
https://doi.org/10.1002/jccs.199300060
https://doi.org/10.1002/jccs.199300060
Publikováno v:
Canadian Journal of Chemistry. 71:796-800
In the presence of a Lewis acid, 4-hydroxymethylsydnones undergo reaction with alcohols and benzene to form 4-alkoxysydnones 1a, bis(4-sydnonylmethyl) ethers 1b, or 4-benzylsydnones 1d depending upon the reaction conditions. At 0 °C, compounds 1a an
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d412a83b805f1908e3dc29f5c366122
https://doi.org/10.1139/v93-105
https://doi.org/10.1139/v93-105
Publikováno v:
ChemInform. 24
In the presence of a Lewis acid, 4-hydroxymethylsydnones undergo reaction with alcohols and benzene to form 4-alkoxysydnones 1a, bis(4-sydnonylmethyl) ethers 1b, or 4-benzylsydnones 1d depending up...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::65e328df6862a352a9ab996ebb885e11
https://doi.org/10.1002/chin.199349182
https://doi.org/10.1002/chin.199349182
Publikováno v:
Journal of the Chinese Chemical Society. 39:107-110
A series of 4-formyl-, 4-acetyl- and 4-(l'-hydroxyethyl)sydnones have been prepared in good yields by reaction of sydnone with butyllithium or a Grignard reagent and N,N-dimethylformamide, N,N-dimethylacetamide and acetylaldehyde, respectively.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac58a2d2d6dc180ecce0da6cf7dd49af
https://doi.org/10.1002/jccs.199200017
https://doi.org/10.1002/jccs.199200017
Publikováno v:
Organic Mass Spectrometry. 26:583-586
The mass spectra of 2- and/or 6-aIkyI-3-hydroxypyridines were measured. The fragmentation processes include the loss of 1, 28 and 29 u and RCN from the molecular ions. Among the characteristic ions, the [M – 1]+ ions are the base peak for all of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be7812deca1ba966f177052de721819f
https://doi.org/10.1002/oms.1210260609
https://doi.org/10.1002/oms.1210260609
Publikováno v:
Journal of the Chinese Chemical Society. 38:171-178
Thirty-one mass spectra of the 3,4-disubstituted sydnones have been measured under EI conditions. The fragmentation processes are cleavage of the 4-substituent and a channel with loss of CO and NO. The competitive fragmentations depend upon the natur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::481e6207c7f1da896b5baa884609b90a
https://doi.org/10.1002/jccs.199100028
https://doi.org/10.1002/jccs.199100028
Autor:
Shaw‐Taolin, Ling-Ling Tien
Publikováno v:
Journal of the Chinese Chemical Society. 37:565-570
Fourteen mass spectra of the sydnonylmethanols and their derivatives have been measured under EI conditions. The process of losing a OR' radical and hydrogen migration reaction are accompanyed with lost of a CO and an NO channel. The competition betw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd22ab42ce8acd594dd0fe4f653f0f36
https://doi.org/10.1002/jccs.199000077
https://doi.org/10.1002/jccs.199000077
Autor:
Ling-Ling Tien, Shaw-Tao Lin
Publikováno v:
Journal of the Chinese Chemical Society. 37:95-99
The mass spectra of twenty-nine sydnones were measured by using NII3 as a reagent gas. The [M + H + NH3]+ ions are the base peaks for the entire series. Very few fragment ions were observed except for the derivatives of 4-hydroxymethylenesydnones (XX
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc5f388a707c3c566098da0e020994cc
https://doi.org/10.1002/jccs.199000014
https://doi.org/10.1002/jccs.199000014
Publikováno v:
Denki Kagaku oyobi Kogyo Butsuri Kagaku. 57:806-809
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79b2b39bcc5e9a56197e829151bf4388
https://doi.org/10.5796/kogyobutsurikagaku.57.806
https://doi.org/10.5796/kogyobutsurikagaku.57.806
Publikováno v:
HETEROCYCLES. 29:185
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d9e24c95eeed1804369e9f9482d8cfb
https://doi.org/10.3987/com-88-4766
https://doi.org/10.3987/com-88-4766