منابع مشابه
Reactions of Carboxylic Acid Derivatives I
This is probably the single most important reaction of carboxylic acid derivatives. The overall transformation is defined by the following equation, and may be classified either as nucleophilic substitution at an acyl group or as acylation of a nucleophile. For certain nucleophilic reagents the reaction may assume other names as well. If Nuc-H is water the reaction is often called hydrolysis, i...
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The expanding use of microorganisms in the study of amino acid metabolism has brought with it many new and some as yet unsolved problems. One of the questions that is continually before the microbiological analyst is whether the growth response of an organism to a given amino acid is specific or whether some derivatives or closely related compound might serve just as well. Scattered observation...
متن کاملAmino acid derivatives in bacterial metabolism. I. Derivatives of leucine, phenylalanine, tryptophan, and valine.
The expanding use of microorganisms in the study of amino acid metabolism has brought with it many new and some as yet unsolved problems. One of the questions that is continually before the microbiological analyst is whether the growth response of an organism to a given amino acid is specific or whether some derivatives or closely related compound might serve just as well. Scattered observation...
متن کامل(E)-2-Benzylidenecyclanones: Part XV. Stereochemistry of Reaction of 2-Arylidenecyclopentanones with Dithiocarbamic Acid
Submit Manuscript | http://medcraveonline.com carbonic acid derivatives is a method frequently used for the synthesis of pyrimidines and 1,3-thiazines [1-7]. Although these methods have been mentioned in the literature for a long time, there are only a few examples of investigation on the mechanism and the stereochemistry of reactions. Based on earlier examinations [5-7] reaction of α,β-unsatur...
متن کاملKojic Acid Derivatives
Melanin is one of the most important pigments which exist ubiquitously from microorganisms to plants and animals. It is secreted by melanocyte cells and determines the color of skin and hair in mammalians. It protects the skin from photocarcinogenesis by absorbing UV sunlight and removing reactive oxygen species (ROS) (Gupta, 2006; Kim, 2005; Sapkota, 2011). It is formed by enzymatically cataly...
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ژورنال
عنوان ژورنال: Journal of Bacteriology
سال: 1949
ISSN: 0021-9193,1098-5530
DOI: 10.1128/jb.57.1.47-54.1949