- Transition-metal-free Intramolecular C-H amination of sulfamate esters and: N -alkylsulfamides
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The transition-metal-free intramolecular C-H amination of sulfamate esters using iodine oxidants, tert-butyl hypoiodite (t-BuOI) and N-iodosuccinimide (NIS) is reported. A method using NIS was also successfully applied to the oxidative cyclization of N-alkylsulfamides.
- Kiyokawa, Kensuke,Nakamura, Shogo,Jou, Keisuke,Iwaida, Kohji,Minakata, Satoshi
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supporting information
p. 11782 - 11785
(2019/10/02)
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- Synthesis and Antidepressant Profiles of Phenyl-Substituted 2-Amino- and 2--1,4,5,6-tetrahydropyrimidines
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A series of 4(6)- and 5-phenyl-substituted 2-amino- and 2-(alkoxycarbonyl)amino-1,4,5,6-tetrahydropyrimidines 2 were prepared and evaluated for central nervous system (CNS) effects in animal models.Several 5-phenyl-substituted compounds possessed potent
- Weinhardt, Klaus,Wallach, Marshall B.,Marx, Michael
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p. 694 - 698
(2007/10/02)
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- Preparation and Spectroscopic Studies of Stereoisomers of the Triscobalt(III) Complex
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Three, fac-Δ, fac-Λ, and mer-Δ, of four possible diastereomers of the 3+ complex (S-phtn=(S)-1-phenyl-1,3-propanediamine) were obtained by two methods, a reaction between trans-+ and S-phtn in DMSO (dimethyl sulfoxide), and oxidation of a DMSO solution containing Co(II) ions and S-phtn with air in the presence of active charcoal.Neither method yielded the mer-Λ isomer.The absorption and circular dichroism spectra of the isomers were recorded in water in the absence and presence of Na2SO4, and in DMSO.The shifts of the first absorption bands caused by changing solvents and the changes of circular dichroism spectra caused by the addition of sulfate ions seem to be related with the conformational instability of the flexible six-membered chelate ring in the complexes.The tetraammine complex of S-phtn was also prepared.
- Kojima, Masaaki,Fujita, Junnosuke
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p. 1454 - 1459
(2007/10/02)
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- 4-Phenyl-and 5-phenyl-1,4,5,6-tetrahydropyrimidine derivatives
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Certain 1,4,5,6-tetrahydropyrimidine compounds which are substituted with an amino, amido or carbamate at the 2-position, with an optionally substituted phenyl at the 5-position or at the 4-position when there is no alkyl at the 1-position and optionally
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