Thermolysis of N-aryl-N-nitrosoureas to afford aryl isocyanates and nitrosamines via O-nitrosoisourea intermediates.
نویسندگان
چکیده
منابع مشابه
Catalytic N-N coupling of aryl azides to yield azoarenes via trigonal bipyramid iron-nitrene intermediates.
The reactivity of the trigonal bipyramidal iron(I) complex [SiP(iPr)(3)]Fe(N(2)) ([SiP(iPr)(3)] = (2-iPr(2)PC(6)H(4))(3)Si(-)) toward organoazides has been examined. 1-Adamantylazide was found to coordinate the iron center to form stable [SiP(iPr)(3)]Fe(eta(1)-N(3)Ad). Aryl azides instead afforded unstable [SiP(iPr)(3)]Fe(N(3)Ar) species that decayed gradually to regenerate [SiP(iPr)(3)]Fe(N(2)...
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Some N¬-acyl-N'-aryl thiourea derivatives 4(a-f) have been prepared by the reaction of acyl halides ammonium thiocyanate and aryl amines. The structures of synthesized compounds have been characterized by IR, 1HNMR spectral studies. The synthesized compounds 5(a-f) have been screened for antibacterial activity. The effect of the structure of the investigated compounds on the antibacterial activ...
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Abstract Various arylamines were converted in two steps to N-Boc-N-arylphosphoramidates. LiTMP and LDA induced directed ortho-metalation at temperatures from -78 to 0 °C. The ensuing [1,3]-migration of the phosphorus atom with its substituents from the nitrogen to the ortho-carbanionic carbon atom gave N-Boc-protected o-aminoarylphosphonates. The nature of the substituent of 3-substituted pheny...
متن کامل[(Salcen)Cr(III) + Lewis base]-catalyzed synthesis of N-aryl-substituted oxazolidinones from epoxides and aryl isocyanates.
[(Salcen)Cr(III) + Lewis base] was found to be a highly active and selective catalyst system in the [2+3] cycloaddition between epoxides and isocyanates to form 5-oxazolidinones. The reaction proceeds to high yield under mild reaction conditions and is applicable to a variety of terminal epoxides and aryl isocyanates.
متن کاملC(aryl)-O bond formation from aryl methanesulfonates via consecutive deprotection and S(N)Ar reactions with aryl halides in an ionic liquid.
An efficient K3PO4-mediated synthesis of unsymmetrical diaryl ethers using the ionic liquid [Bmim]BF4 (1-butyl-3-methylimidazolium tetrafluoroborate) as solvent has been developed. The procedure involves consecutive deprotection of aryl methane-sulfonates and a nucleophilic aromatic substitution (S(N)Ar) with activated aryl halides.
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ژورنال
عنوان ژورنال: Chemical and Pharmaceutical Bulletin
سال: 1990
ISSN: 0009-2363,1347-5223
DOI: 10.1248/cpb.38.2644