منابع مشابه
Reversibility of a phosphoroclastic reaction.
Reaction 1 occurring with reaction 2 involves carbon dioxide fixation. Koepsell & Johnson (1942) obtained a cell-free extract from Clo8tridium butylicum which converts pyruvic acid into acetic acid, carbon dioxide and hydrogen, and requires phosphate for the reaction. Later Koepsell, Johnson & Meek (1944) found that inorganic phosphate is taken up and labile phosphate appears. The overall react...
متن کاملReversibility of the ATP:glutamine synthetase adenylyltransferase reaction.
The reversibility of adenylylation of glutamine synthetase from E. coli by adenylyltransferase was demonstrated. Several positive effectors (Gln, 2-hydroxyethyl-S-cysteine, Trp and Met) stimulate the back reaction in the same manner as the forward reaction. The apparent Michaelis constant for PP(i) is 2.2 mM at pH 7.35. The pH optimum of the back reaction is 6.5-7 while the pH optimum of the fo...
متن کاملSquaramide-catalysed asymmetric cascade aza-Michael/Michael addition reaction for the synthesis of chiral trisubstituted pyrrolidines.
A bifunctional squaramide catalysed aza-Michael/Michael cascade reaction between nitroalkenes and tosylaminomethyl enones or enoates has been developed. This organocatalytic cascade reaction provides easy access to highly functionalized chiral pyrrolidines with a broad substrate scope, giving the desired products in good yields (up to 99%) with good diastereoselectivities (up to 91 : 9 dr) and ...
متن کاملIntramolecular Michael addition reaction for the synthesis of benzylbutyrolactones.
A convenient synthesis of benzyl-gamma-butyrolactone derivatives via intramolecular Michael addition reaction of nitro-substituted aryl allyl beta-ketocarboxylates is reported. The method features simple operation, mild reaction conditions and high efficiency.
متن کاملEfficient synthesis of multicyclic spirooxindoles via a cascade Michael/Michael/oxa-Michael reaction of curcumins and isatylidene malononitriles.
A cascade Michael/Michael/oxa-Michael reaction between curcumins and isatylidene malononitriles has been developed. Multicyclic spirooxindoles were prepared in excellent yields and diastereoselectivities. DMAP was found to catalyze this transformation efficiently under mild reaction conditions.
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ژورنال
عنوان ژورنال: J. Chem. Soc., Trans.
سال: 1921
ISSN: 0368-1645
DOI: 10.1039/ct9211901976