Zobrazeno 1 - 10
of 57
pro vyhledávání: '"John N. Marx"'
Autor:
John N. Marx, Howard M. Merken
Publikováno v:
ARKIVOC, Vol 2003, Iss 12, Pp 186-196 (2004)
Externí odkaz:
https://doaj.org/article/6c43caf2935b43d2b4c0359e20046af5
Publikováno v:
The Journal of Organic Chemistry. 72:6154-6161
Addition of phenoxathiin cation radical (PO*+) to acyclic alkenes in acetonitrile (MeCN) solution occurred stereospecifically to form bis(10-phenoxathiiniumyl)alkane adducts. Stereospecific trans addition is ascribed to the intermediacy of an episulf
Autor:
Bing-Jun Zhao, Henry J. Shine, John N. Marx, Anna T. Kelly, Cristina Hofmann, Kenton H. Whitmire
Publikováno v:
Journal of Sulfur Chemistry. 27:127-138
Autor:
Henry J. Shine, Cristina Hofmann, John N. Marx, Kenton H. Whitmire, Anna T. Kelly, Bing Jun Zhao, Teyeb Ould-Ely
Publikováno v:
Journal of Sulfur Chemistry. 27:139-147
Reaction of thianthrene cation radical tetrafluoroborate with 1,5-hexadiene, 1,7-octadiene, 1,8-nonadiene and 1,9-decadiene in the molar ratio 4:1 caused addition to occur to one and both of each diene’s double bonds. A mixture of four adducts was
Autor:
Kenton H. Whitmire, Paramashivappa Rangappa, John N. Marx, Henry J. Shine, and Anna T. Kelly, Teyeb Ould-Ely
Publikováno v:
The Journal of Organic Chemistry. 70:9764-9770
[structure: see text] Thianthrene cation radical tetrafluoroborate (Th*+ BF4(-)) added to the terminal alkynes 1-pentyne, 1-hexyne, 1-heptyne, 1-octyne, 1-nonyne, and 1-decyne to form trans-1,2-bis(5-thianthreniumyl)alkene tetrafluoroborates (1-6). S
Autor:
Dennis C. Shelly, Paramashivappa Rangappa, John N. Marx, Kenton H. Whitmire, Teyeb Ould-Ely, Henry J. Shine
Publikováno v:
The Journal of Organic Chemistry. 70:3877-3883
[reaction: see text] Thianthrene cation radical tetrafluoroborate (Th*+ BF4-) added to 2-butyne, 3-hexyne, 4-octyne, and 5-decyne in MeCN to form trans bisadducts R(Th+)C=C(Th+)R, where R = Me, Et, Pr, Bu (7a-d). Phenoxathiin cation radical tetrafluo
Autor:
Howard M. Merken, John N. Marx
Publikováno v:
ARKIVOC, Vol 2003, Iss 12, Pp 186-196 (2004)
Migration of electron-withdrawing substituents in carbocations normally occurs in preference to other common substituents that are normally very good migrating groups, if the electronwithdrawing group contains a π bond. This study represents the fir
Autor:
John H. Thurston, Bing-Jun Zhao, Ding Quan Qian, John N. Marx, Kenton H. Whitmire, Henry J. Shine, Ilse Y. Guzman-Jimenez, Teyeb Ould-Ely
Publikováno v:
The Journal of Organic Chemistry. 68:8910-8917
Phenoxathiin cation radical perchlorate (PO.+ClO4(-)) added stereospecifically to cyclopentene, cyclohexene, cycloheptene, and 1,5-cyclooctadiene to give 1,2-bis(5-phenoxathiiniumyl)cycloalkane diperchlorates (4-7) in good yield. The diaxial configur
Publikováno v:
Synthetic Communications. 33:457-461
We report that N-benzyloxycarbonyl groups can be conveniently removed from 1,4,7,10-tetraazacyclododecanes by catalytic transfer hydrogenation with cyclohexene and 5% palladium–carbon catalyst. The process is rapid, selective, inexpensive, and is h
Autor:
Jiong Chen, John N. Marx
Publikováno v:
Tetrahedron Letters. 38:1889-1892
A new synthesis of (−)-rishitin (1) is reported, starting with chiral pool molecules. The crucial step is a stereoselective vinyl radical cyclization, which gives a 10:1 ratio of 21 to 22.