3, 5-diamino properties

Pteridine, 6-adamantyI-2,4-diamino-pharmacological properties, 3, 325 Pteridine, 7-aIkyI-synthesis, 3, 314 Pteridine, 6-aIkyI-7-amino-synthesis, 3, 314 Pteridine, 6-aIkyIidene-synthesis, 3, 304 Pteridine, 7-aIkyIidene-synthesis, 3, 302... 

Pteridine, 2,4-diamino-6,7-diisopropyl-pharmacological properties, 3, 325 Pteridine, 2,4-diamino-6,7-dimethyl-pharmacological properties, 3, 325 Pteridine, 2,4-diamino-2,6-diphenyl-... 

Pteridine, 2,4-diamino-7-pyrrolidino-hydrolysis, 3, 294 synthesis, 3, 290 Pteridine, 2,4-diamino-7-styryl-synthesis, 3, 319 Pteridine, 2,4-dichloro-properties, 3, 267 Pteridine, 4,6-dichloro-reaction... 

Both the monoamino and the diamino analogs of ascorbic acid exhibit powerful reducing properties, and the monoamino compound has a high antiscorbutic activity, probably due to the fact that it undergoes conversion to L-ascorbic acid in vivo by a process of deamination. 

Derivatives of diaminoanthrarufin (3.77 X = Y = H) and its 1,8-dihydroxy-4,5-diamino isomer (diaminochrysazin) have been among the most widely used anthraquinone dyes for ester fibres. For example, methylation of diaminoanthrarufin gives Cl Disperse Blue 26, a mixture of several components. Study of the pure N-alkylated derivatives from the base confirmed that monosubstitution (3.77 X = H, Y = alkyl) gives mid-blue dyes with excellent dyeing properties and acceptable fastness on polyester, but the bis-alkyl dyes (3.77 X = Y = alkyl) are greener and inferior in application properties. Mixtures of the unsubstituted base with alkylated components, as obtained industrially, were especially advantageous for build-up to heavy depths, however [93]. 

A comparison of the hydrolytic stability of several sulfonated six-membered ring polyimides was previously investigated. Membranes were placed in distilled water at 80 °C until a loss of mechanical properties was observed. Improvements in membrane stability were observed for polymers with lower degrees of sulfonation (lower lEC) and for random copolymers, as opposed to block or sequenced copolymers. Additionally, the flexibility of the sulfonated diamine in the polymer structure was shown to play an important role in stability. By simply changing the sulfonated diamine from the rigid 4,4 -diamino-... 

Some nitro derivatives of benzofurazan have been investigated for their explosive properties. 4-Amino-5,7-dinitrobenzofurazan (56) has been prepared by a number of routes including (1) the thermally induced cyclodehydration of l,3-diamino-2,4,6-trinitrobenzene (55), (2) the nitration of 4-amino-7-nitrobenzofurazan and (3) the reduction of 4-amino-5,7-dinitrobenzofuroxan with triphenylphoshine. The isomeric 5-amino-4,7-dinitrobenzofurazan (57) has been prepared along similar routes. ... 

Al,A -Bis(l,2,4-triazol-3-yl)-4,4 -diamino-2,2, 3,3, 5,5, 6,6 -octanitroazobenzene (BTDAONAB) (105) has recently been synthesized by Agrawal and co-workers by tandem nitration-oxidative coupling of 4-chloro-3,5-dinitroaniline (103) followed by displacement of the chloro groups with 3-amino-1,2,4-triazole. This is a thermally stable explosive with some impressive properties, exceeding TATB in both thermal stability and explosive performance (VOD 8321 m/s, d = 1.97 g/cm ). This compound doesn t melt and the DTA exotherm is not seen until 550 °C. 

The epoxy resin formed by tetraglycidyl 4,4 -diamino diphenyl methane and 4,4 -diamino diphenyl sulfone was characterized by dynamic mechanical analysis. Epoxy specimens were exposed to varying dose levels of ionizing radiation (0.5 MeV electrons) up to 10,000 Hrads to assess their endurance in long-term space applications. Ionizing radiation has a limited effect on the mechanical properties of the epoxy. The most notable difference was a decrease of approximately 40°C in Tg after an absorbed dose of 10,000 Mrads. Sorption/desorption studies revealed that plasticization by degradation products was responsible for a portion of the decrease in Tg. 

Neomycin Neomycin is a complex mixture of antibiotics (neomycins A, B, C, D, E, and F), that is formed by the actinomycete S. fradiae. Neomycin A, also called neamine, is 2-deoxy-4-0-(2,6-diamino-2,6-dideoxy-a-D-glucopyranosyl)-D-streptamine (32.4.2), and it does not display antibiotic properties. At the same time, neomycin B, 0-2,6-diamino-2,6-dideoxy-a-D-glucopyranosyl(l— 4)-0-[0-2,6-diamino-2,6-dideeoxy-)3-L-idopyra-nosyl-(l—>3)-)3-D-ribofuranosyl-(l— 5)]-2-deoxy-D-streptamine (32.4.3), differs from neomycin A in the presence a second glycoside residue and exhibits powerful antibacterial... 

Diamino-1,2,4-thiadiazoles of type (361) have been patented for use in the treatment of hypertension <82EUP44266), while 5-amino-1,2,4-thiadiazoles such as (362) are claimed to be useful for treating autoimmune diseases and in the prevention of graft rejection. Compounds of type (362) also have antirheumatic properties and are, in particular, useful in the treatment of rheumatoid arthritis and immune diseases such as systemic lupus <91EUP455356). 

N.L. Benoiton, N-Alkyl-diamino acids, Chemistry and Properties, Chem. Biochem. Amino Acids Pept. Proteins 5, 163 (1978). 

A successful route to 91 utilizes the property of 2-amino-3-carboxy-pyrazines to smoothly undergo nitrative decarboxylation. Thus, treatment of a concentrated sulfuric acid solution of 85 with nitric acid in sulfuric acid at 10 to 25°C gives 2,6-diamino-3,5-dinitropyrazine (92) in high... 

It is insoluble in water, microcrystallinc, and lilac in colour.1 Many of these derivatives of platinum containing organic bases have been obtained in optically active forms. Those containing 1-propylene-diamine will serve as examples. These are easily prepared, and as they are remarkably stable are easily examined for optical properties. The compounds are prepared by the interaction of cis-dichloro-l-propylenc-diamino-platinum, [Pt pnCl2], with the calculated quantity of the corresponding base, 1-propylcnediamine, ammonia, ethylenediamine, or trimethylenediamine. The liquid obtained is evaporated on a water-bath and precipitated with alcohol. The di-derivative of 1-propylene-diamine, [Pt pns]Cla, has rotation [a]o+46-37°, [M]r>+192-0°. 

A number of explosives for various applications have been synthesized, characterized for structural aspects, thermal and explosive properties by us in India and are being evaluated [193-198] for their intended end-use. The evaluation of BTATNB [Structure (2.27)] indicates that it is slightly more thermally stable than PATO [Structure (2.24)] coupled with better insensitivity toward impact and friction [71]. The data on thermal and explosive properties of some aromatic nitrate esters suggest that l,3,5-tris(2-nitroxyethyl nitramino)-2,4,6-trinitrobenzene [Structure (2.54)] is a potential substitute of PETN [193]. An explosive called 2,4,6-tris (3,5 -diamino-2, 4, 6 -trinitrophenylamino)-l,3,5-triazene [designated as PL-1 Structure (2.55)] is a new thermally stable and insensitive explosive which on comparison with TATB suggests that it is slightly inferior to TATB [Structure... 

An AB monomer, 2-(4-hydroxyphenyl)-3-phenyl-6-fluoroquinoxaline [17], was prepared from the reaction of 4-hydroxybenzil and l,2-diamino-4-fluorobenzene and subsequently polymerized under aromatic nucleophilic displacement conditions in NMP. The resultant polymer exhibited an intrinsic viscosity of 1.23 dL/g, a Tg of 247 °C and thin film tensile strength and modulus at room temperature of 107 Mpa and 3.2 GPa, respectively [17]. The same AB monomer was also copolymerized with hydroquinone and 4,4 -difluorodiphenyl sulfone to yield a series of copolymers with interesting properties [17]. The same AB monomer was prepared and polymerized by other researchers to yield a polymer with an intrinsic viscosity of 0.65 dL/g and a Tg of 255 °C [18]. 

---