2641 results about "Substitution reaction" patented technology

The present invention discloses synthesis of 2,2′-disubstituted 9,9′-spirobifluorene-based triaryldiamine. First, 2,2′-diamino-9,9′-spirobifluorene, a Pd-catalyst as auxiliary and aryl halide BX are provided, wherein X is selected from the group consisting of: Cl, Br and I, B comprises one of the following group: aryl moiety, hetero cycle, multiple fused ring, multiple fused ring with hetero atom(s). Next, a substitution reaction is performed to react the 2,2′-diamino-9,9′-spirobifluorene with the aryl halide BX to produce the 2,2′-disubstituted 9,9′-spirobifluorene-based triaryldiamines. In addition, the present invention discloses organic light emitting devices comprising hole transporting material comprising 2,2′-bis(N,N-disubstituted amino)-9,9′-spirobifluorenes.

Paper, cotton, corn stover, straw, and wood are converted into furanic products in high yields (based on their cellulose content) using a simple, inexpensive process involving concurrent hydrolysis, dehydration, and substitution reactions coupled with continuous extraction into an organic phase. In a simultaneous process, the hemicellulose fraction of these substrates is converted into furfural, and together these constitute an efficient means for the total exploitation of the carbohydrate content of biomass.

Provided are a method for producing a modified conjugated diene polymer / copolymer including a modified reaction step for causing an organosilane compound having a characteristic group for producing a silanol group by hydrolysis and, in the vicinity of the characteristic group, (i) a functional group for combining the organosilane compound with the conjugated dione polymer / copolymer by performing an addition or substitutive reaction on an active site and, after the reaction, prompting a reaction between the silanol group and a reinforcing filler or (ii) a functional group for prompting the reaction between the silanol group and the reinforcing filler to react with the active site of a conjugated dione polymer / copolymer having the active site, and a hydrosis step performed after completing the modified reaction step; a modified conjugated diene polymer / copolymer having, at an end of a molecular of a conjugated diene polymer / copolymer, a silanol group and, in the vicinity of the silanol group, a functional group for prompting a reaction between the silanolgroup and a reinforcing filler; and a rubber composition having the modified conjugated polymer / copolymer and carbon black of a specific property; and a tier using the rubber composition.