منابع مشابه
The Action of Diazomethane on Uracil.
In the course of work now in progress on the determination of constitution of nucleic acid and its primary hydrolytic products-neucleotides and neucleosides-it has finally become necessary to develop and utilize a new method for introducing methyl radicals into pyrimidine and purine combinations. The alkylation methods generally employed for bringing about such changes, namely, by interaction o...
متن کاملReaction of Silk Fibroin with Diazomethane
The treatment of silk with an ethereal solution of diazometbane result ed in a rapid decrease in tyrosine content, with no appreciable d ecrease in tensile strength <o f the fibers . The results indicate that the hydroxyl groups of tyrosine in the 'Untreated fibers are free. The total methoxyl content after treatment of the fiber for 25 hours or longer was greater than could be accounted for by...
متن کاملUnusual regioselective mercuration of metalloporphyrins and its potential applications.
The reaction of Hg(CF3CO2)2 with metalloporphyrins produces mercurated porphyrins regioselectively, the reaction, surprisingly occurring at the most hindered betaB-position; this behavior is in marked contrast to the usual electrophilic substitution reactions of porphyrins, whose reactions produce meso-substituted porphyrins; the obtained mercurated porphyrins are active to transition metal-cat...
متن کاملReactions of Diazomethane with Sulfonyl-activated Double Bonds
The cyclo-addition reaction of diazomethane with a,/3-unsaturated sulfones is described. Divinyl sulfone and phenyl vinyl sulfone give 1or 2-pyrazolines depending on the reaction conditions. cisand /rans-l,2-Bis(methylsulfonyl)ethene form pyrazolines, which on reaction with either triethylamine or excess of diazomethane lead to substituted pyrazoles. The addition of diazomethane to doüble bonds...
متن کاملReactions of Diazomethane with Sulfonyl-activated Double Bonds
The cyclo-addition reaction of diazomethane with a,/3-unsaturated sulfones is described. Divinyl sulfone and phenyl vinyl sulfone give 1or 2-pyrazolines depending on the reaction conditions. cisand /rans-l,2-Bis(methylsulfonyl)ethene form pyrazolines, which on reaction with either triethylamine or excess of diazomethane lead to substituted pyrazoles. The addition of diazomethane to doüble bonds...
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ژورنال
عنوان ژورنال: Nature
سال: 1963
ISSN: 0028-0836,1476-4687
DOI: 10.1038/199903a0