Über die Umsetzung von Chlorcyan mit Schwefeltrioxyd

Abstract

Bei der Einwirkung von Schwefeltrioxyd auf Chlorcyan entstehen die bisher nicht beschriebenen Verbindungen CO3NClS, CO6NClS2 und C2O3N2Cl2S, deren Konstitution sichergestellt wird. Es werden Vorschriften zur laboratoriumsmäßigen Herstellung dieser Verbindungen mitgeteilt und deren Eigenschaften näher beschrieben.

Efficient Synthesis of Primary Nitrocarbamates of Sugar Alcohols: From Food to Energetic Materials

“…In the 13 CNMR spectrum of carbamate 2a the two different carbonyl groups are found, as expected, in close proximity at 156.7 and 156.2 ppm. For the nitrocarbamate 3a this group suffers ah igh field shift by almost9 ppm to 148.2 and Scheme2.Synthesis of carbamates 2 and nitrocarbamates 3 from sugar alcohols 1.…”

“…[12] Results and Discussion Af urtherd evelopment of an isocyanic acid equivalent is introduced by the two highly activated isocyanates chlorosulfonyl isocyanate (CSI)a nd trichloroacetyli socyanate (TAI). [13] Both reagents are easy-to-handle liquids, which quicklyr eact with alcohols already at low temperatures. [14] Advantageouslyi st he formation of ac hlorosulfonyl, respectively trichloroacetyl, carbamate intermediate, which prevents multiaddition during the reactiont ime.…”

Low‐Temperature Polymerization of Ethylene

“…The olefin mixture (25 ml) was weighed into a 100-ml flask provided with devices to ensure exclusion of moisture, cooling (2OoC), and magnetic stirring, and treated with a small excess of chlorosulfonyl isocyanate [25]. Stirring was continued for ca.…”

4,6-Disubstituted 1,2,3,5-oxathiadiazine-2,2-dioxides. Synthesis, structural features, chemical properties (Review)

“…2 RCN + SO3 ~ J/ ~.~ R f "'N ~" R I Later it was established that the cyano group of cyanogen chloride [8], tribromo-, dichloro- [9], trichloroacetonitriles [10], o~-hydrotetrafluoropropionitrile [ 11 ] reacts with SO 3 differently, with formation of another type of heterocycle: 2,6-disubstituted 1,4,3,5-oxathiadiazine-4,4-dioxides (II), isomeric to heteroeycle I [8][9][10]. Investigation of the reaction of nitriles with SO 3, including early stages of the reaction [12][13][14][15][16][17][18][19][20][21][22][23], have made k possible to explain the nature of this dual behavior of the cyano group in cycloaddition with SO 3 and to develop approaches allowing us to predict the orientation of the reaction, and also to ensure its goal-oriented behavior.…”