Ethanoyl group

HisN03,(CH3)3N + -CH2 CH0H CH2C00-. Isolated from skeletal muscle. It acts as a carrier for ethanoyl groups and fatty acyl groups across the mitochondrial membrane during the biosynthesis or oxidation of fatty acids. 

SH or — NH group to give acetyl (ethanoyl) derivatives which are useful for characterization. Largely used for the production of cellulose ethanoate, also used for the manufacture of vinyl ethanoate and aspirin. U.S. production 1978 680 000 tonnes. 

An alternative strategy is to put a 3-(-2-dioxolanyl)ethanoyl substituent in place first and then add the C7-substituent by a Grignard addition. This approach was applied to the synthesis of 8.2C but in this case it was found necessary to remove the tosyl protecting group prior to cyclization[l]. 

There are two principle pathways for utilization of the ethanoyl coenzyme A (CH3CO—SCoA) formed in each turn of the oxidation cycle of Figure 18-8. Either it is used to synthesize larger molecules such as fatty acids, steroids, and so on, as will be described in Section 30-5A, or the acyl group is oxidized to C02 and H20 ... 

Exercise 22-30 a. In the nitration of para-cymene by ethanoyl nitrate in ethanoic anhydride, the observed product composition at 0° is 41 % 5 and 6, 41 % 3, 8% 4, and 10% of 4-nitromethylbenzene. Use these results to determine the relative reactivities of the para-cymene ring carbons towards N02 . Give your answer relative to C3 as unity (C3 is the carbon next to the isopropyl group). Determine the relative reactivities based on the data obtained in Equation 22-1. How does neglect of ipso substitution affect calculation of relative reactivities of the ring carbons b. Write a mechanism for the solvolytic conversion of 5 and 6 to 3. 

The CH3CO group of ethanoyl coenzyme A is first transferred to a protein having a free thiol (SH) group to make another thioester, represented here as CH3COS—AGP, where ACP stands for Acyl-Carrier-Protein. The growing carbon chain remains bound to this protein throughout the synthesis ... 

The biosynthesis of terpenes clearly follows a somewhat different course from fatty acids in that branched-chain compounds are formed. One way that this can come about is for 2-oxobutanoyl coenzyme A to undergo an aldol addition at the keto carbonyl group with the ethanoyl coenzyme A to give the 3-methyl-3-hydroxypentanedioic acid derivative, 8 ... 

This synthesis requires adding an ethyl group to pyrrolidine to make a tertiary amine. The acid chloride needed will be acetyl chloride (ethanoyl chloride). Reduction of the amide gives A-ethylpyrrolidine. 

Trivial names also extend to fragments of structures containing functional groups. Acetone, acetaldehyde, and acetic acid all contain the acetyl group (MeCO-, ethanoyl) abbreviated Ac and chemists often use this organic element in writing Ac OH for acetic acid or EtOAc for ethyl acetate. 

The H on the N of the amine group can also be substituted by other groups especially by acyl groups such as COCH3, when attacked by ethanoyl chloride, CH3COCI or ethanoic anhydride, (CH3C0)20. 

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