ketene वाक्य
उदाहरण वाक्य
मोबाइल
- In the proposed reaction mechanism the base first converts the acid chloride to the ketene, the organocatalyst then introduces chirality through its quininoid tertiary amine, forming a ketene adduct.
- A newer, more efficient preparation of cyclobutanone was found by P . Lipp and R . K�ster in which a solution of diazomethane in diethyl ether is reacted with ketene.
- The route from acetic acid to acetic anhydride via ketene was developed by Wacker Chemie in 1922, when the demand for acetic anhydride increased due to the production of cellulose acetate.
- In 1896, the black paper, " The Leavenworth Herald ", edited by Blanche Ketene Bruce, called Thompson the " best newspaper correspondent on the colored press ."
- Some more specialized examples are known including nitroso-oxime, ketene-ynol, amide-imidic acid ( e . g ., the latter is encountered during nitrile hydrolysis reactions );
- Heating a cyclobutenone above 80 �C initiates a four-electron electrocyclic cleavage generating a vinyl ketene which reacts with an acetylene in a regiospecific [ 2 + 2 ] cycloaddition ( Scheme 4 ).
- The parent compound is labile with melting point " 90 �C and has been prepared by reaction of ketene with diazomethane at " 145 �C . Derivatives of cyclopropanone are of some interest to organic chemistry.
- Methylation of E, catalyzed by rhodium, produced F . The dehydroxylation and selective oxidation of the secondary hydroxy group of F produced G . G reacted with triphenyl phosphoranylidene ketene and the ester bonds in G were hydrolyzed to produce ouabagenin, a precursor to ouabain.
- "' Ethenone "'is the formal name for "'ketene "', an organic compound with formula C 2 H 2 O or H 2 C = C = O . It is the simplest member of the ketene class.
- "' Ethenone "'is the formal name for "'ketene "', an organic compound with formula C 2 H 2 O or H 2 C = C = O . It is the simplest member of the ketene class.
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