Hydrazinium hydrogen sulfate

With [ N2]hydrazinium hydrogen sulfate and potassium hydroxide, the 2, 3, 5 -tri-0-acetyl-l-( N-amino) (3- N) inosine 54 is obtained (Scheme III.29). The reaction follows the same reaction pathway as described in Scheme III.28 addition of the nucleophile at C-6, ring opening between C(6) and N(l), and ring closure with elimination of nitrous oxide and water. This Sn(ANRORC) reaction provides us with an good entry to N-ring-labeled purines. 

Biurea has been prepared by the reaction of urea with hydrazine hydrate1,2 or with hydrazinium hydrogen sulfate... 

Many of the iV-alkyl and iV-aryl derivatives of urazine have been synthesized and characterized, but the parent substance is not well known. In the past, urazine has been prepared by thermal deammonation of carbohydrazide-iV-carboxamide [eq. (I)],1 fusion of hydrazidicarbamide with hydrazinium hydrogen sulfate [eq. (2)],2 fusion of earbohy-drazide with urea [eq. (3)],3 action of sodium hypobromite on semicarbazide [eq. (4)],4 reaction of dichlorourea with concentrated ammonia [eq. (5)],5 and the reaction between 1,2 hydrazine carboxylic ester and hydrazine hydrate... 

Several salts are explosively unstable, including hydrazinium azide (explodes on rapid heating or on initiation by a detonator, even when damp), chlorate (explodes at m.p., 80°C), chlorite (also highly flammable when dry), hydrogen selenate, hydrogen sulfate (explodes when melted), nitrate, nitrite, and the highly explosive perchlorate and diperchlorate used as propellants [1,2,3]. 

Hydroxylamine-O-sulfonic acid (aminyl hydrogen sulfate) has often proved superior to chloramine for amination the former is a stable crystalline substance that can be easily handled and weighed. It aminates primary279,280 and secondary amines280 to hydrazines, and tertiary amines to hydrazinium salts.28<> It is a stronger animating agent than chloramine as it converts pyridine into the 1-aminopyridinium salt, a reaction that cannot be carried out by chloramine.281 Other heterocycles, e.g., uracil,282 can also be converted into hydrazines by hydroxylamine-O-sulfonic acid. 

Synonyms Diamidogen sulfate Diamine sulfate Hydrazine hydrogen sulfate Hydrazine monosulfate Hydrazine sulfate (1 1) Hydrazinium sulfate Hydrazonium sulfate... 

AMMONIUM FERROUS SULFATE (10045-89-3) Reacts violently with reducing agents, acrolein, alcohols, chlorine trifiuoride, ethers, fluorine, hydrazine, hydrazinium perchlorate, hydrogen peroxide, finely divided aluminum or magnesium, ammonium perchlorate, mercury(II) dinitrate, peroxyfuroic acid, sodium acetylide, tetranitromethane. Sensitizes most organic azides that are unstable shock and heatexplosives. Forms explosive materials with l,3-di(5-tetrazoyl)triazene. Incompatible with glycidol, isopropyl chlorocarbonate, ni-trosyl perchlorate, sodium borohydride. 

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