Zobrazeno 1 - 10
of 53
pro vyhledávání: '"H.I.X. Mager"'
Autor:
R. Addink, H.I.X. Mager
Publikováno v:
Tetrahedron Letters. 20:3545-3548
Kinetic studies have substanciated the idea that the 10 a -hydroxy pseudobase 2 is in equilibrium with a blue transient for which structure 3 has been proposed. The rate-constants and the molar absorbances of the intermediates were estimated.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2be55ee29ff7503f6ae8d076ec418d01
https://doi.org/10.1016/s0040-4039(01)95458-9
https://doi.org/10.1016/s0040-4039(01)95458-9
Autor:
H.I.X. Mager, R. Addink
Publikováno v:
Tetrahedron. 41:183-190
5-Ethyl-3-methyllumiflavinium salts 3 (Scheme 1 ; 5-EtFl + ox + , A - in Scheme 2) may arise in situ on adding an acid (HA) to solutions of the 4 a -flavin adducts 5 in low polar solvents. The acidified solutions were kept under N 2 at 25° in the da
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09aee08b5818a37918b6619a6a63c691
https://doi.org/10.1016/s0040-4020(01)83484-0
https://doi.org/10.1016/s0040-4020(01)83484-0
Autor:
H.I.X. Mager
Publikováno v:
Tetrahedron. 33:981-989
Monoalkoxy adducts, derived from an alloxazinium cation and an alcohol in the presence of a base, are readily converted into dialkoxy adducts. Two types of dialkoxy adducts are formed. In the reaction with a monohydric alcohol C4 is preferred for the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1074c868e96a4d81b398b0a332e45a51
https://doi.org/10.1016/0040-4020(77)80212-3
https://doi.org/10.1016/0040-4020(77)80212-3
Publikováno v:
Tetrahedron. 33:2587-2594
Cationic tetrahydrolumazine radicals and cationic tetrahydropterin radicals were detected by electron spin resonance when 5-alkyl-5,6,7,8-tetrahydrolumazines and 5-alkyl-5,6,7,8-tetrahydropterins were oxidized with hydrogen peroxide in formic acid. T
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b4f8457594d4e1c22fced0f7160b27c
https://doi.org/10.1016/0040-4020(77)80084-7
https://doi.org/10.1016/0040-4020(77)80084-7
Publikováno v:
Journal of Photochemistry. 13:133-147
The photohydration of N5− and N10− substituted alloxazinium cations is described. In dilute buffer the photoreaction of 1,3,5,7,8-pentamethyl-alloxazinium (5-PMA+) perchlorate appears to be much faster than the competing dark reaction, i.e. the N
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffb1e3ac2cf730657eb18c1284c6cef0
https://doi.org/10.1016/0047-2670(80)85005-2
https://doi.org/10.1016/0047-2670(80)85005-2
Autor:
H.I.X. Mager
Publikováno v:
Tetrahedron Letters. 20:2423-2426
The formation of a primary adduct and its successive trapping were carried out with a deuteriated and non-deuteriated nucleophile. The addition sites were ascertained by NMR-specta. The consequences for the structure of ESR-silent blue flavin transie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db76182761a15aa4a86db2d73e5d656b
https://doi.org/10.1016/s0040-4039(01)86309-7
https://doi.org/10.1016/s0040-4039(01)86309-7
Autor:
H.I.X. Mager
Publikováno v:
Tetrahedron Letters. 20:3549-3552
The pyrazine ring opening is proven by rearrangements leading to benzimidazoles 4 , 13 and 14 . A 4a- to 10a-adduct isomerization ( 6 → 7 ) and the intermediacy of a carbonyl oxide 15 are indicated by pyrimidine ring contractions into 8 and 9 , res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c756d012922e854dc840b10cf0c7129
https://doi.org/10.1016/s0040-4039(01)95459-0
https://doi.org/10.1016/s0040-4039(01)95459-0
Autor:
W. Berends, H.I.X. Mager
Publikováno v:
Tetrahedron. 32:2303-2312
The autoxidation of N 1,3,5 -methylated tetrahydrolumazines and dihydroalloxazines and the covalent hydration of the oxidized (6,7-dihydrolumazinium and alloxazinium) species are described. Autoxidation led to ring contractions in which either the or
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21cf67d5d0f79255965b1bb2be69dc03
https://doi.org/10.1016/0040-4020(76)88005-2
https://doi.org/10.1016/0040-4020(76)88005-2
Publikováno v:
Tetrahedron. 31:437-440
The ESR spectra in solution of a number of cationic isoalloxazine free radicals were recorded and interpreted in terms of hyperfine coupling constants. Two previously published interpretations are shown to be incorrect.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::804b52039445b12153581d4fdd570964
https://doi.org/10.1016/0040-4020(75)80057-3
https://doi.org/10.1016/0040-4020(75)80057-3
Autor:
H.I.X. Mager, R. Addink
Publikováno v:
Tetrahedron. 39:3359-3366
Blue coloured 10, 1O a -ring opened intermediates 5 a , 5 b arising in the autoxidation of a dihydroflavin model (Scheme 1) are also formed on proper treatment of some N 1 -alkylflavinium salts 7 (Scheme 2). The conditions giving optimal 10,10 a -rin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d981abfe9b64226f90c4188ad306a0a4
https://doi.org/10.1016/s0040-4020(01)91587-x
https://doi.org/10.1016/s0040-4020(01)91587-x