2845-62-7Relevant articles and documents
Spiro-fysed 2-alkoxy-2-amino-Δ3-1,3,4-oxadiazolines. Synthesis and thermolysis to corresponding aminooxycarbenes
Couture, Philippe,Warkentin, John
, p. 1264 - 1280 (2007/10/03)
Δ3-1,3,4-Oxadiazolines spiro-fused at C2 to C2 to oxazolidines (12) or to C2 of tetrahydro-1,3-oxazines (13) were synthesized. The oxadiazolines undergo thermolysis in benzene at 90°C with first-order rate constants of (1.6-50) × 10-5 s-1. The dependence of these rate constants on the nature of the substituents present on the oxadiazoline ring is consistent with a mechanism involving a carbonyl ylide intermediate. Substituents on N of the oxazolidine or tetrahydro-1,3-oxazine moieties play a major role in determining the fragmentation pathways. Oxadiazolines with N-carbonyl groups (12c-j, 13d,e) afford essentially quantitative yields of the corresponding aminooxycarbenes, while other fragmentation reactions compete with carbene generation in the case of oxadiazolines with N-methyl (12b, 13c) or N-sulfonyl (12k) groups.
Palladium-catalyzed carbonylation of (arylsulfonyliminoido)-benzenes to arylsulfonyl isocyanates
Besenyei,Simandi
, p. 2839 - 2842 (2007/10/02)
In the presence of palladium complexes as catalysts, carbonylation of (arylsulfonyliminoiodo)benzenes to arylsulfonyl isocyanates can be accomplished with 50-80% yield.
Eine neue Palladium-katalysierte Carbonylierung von aromatischen N-Chlorsulfonamidaten zu Arylsulfonylisocyanaten
Besenyei, Gabor,Nemeth, Sandor,Simandi, Laszlo J.
, p. 1168 - 1169 (2007/10/02)
-
