Amidates amide suffix

The names of amides of the type RCNH2 are derived from carboxylic acids by replacing the suffix oic acid or ic acid by amide... 

Amides. For primary amides the suffix -amide is added to the systematic name of the parent acid. For example, CH3—CO—NHj is acetamide. Oxamide is retained for HjN—CO—CO—NHj. The name -carboxylic acid is replaced by -carboxamide. 

For amino acids having trivial names ending in -ine, the suffix -amide is added after the name of the acid (with elision of e for monoamides). For example, HjN—CHj—CO—NHj is glycin-amide. 

Esters are named by replacing the ending -ic acid with the suffix -ate. The alcohol portion of the ester is named by replacing the -ane ending of the parent hydrocarbon name with the suffix -yl. The alkyl radical name of an ester is separated from the carboxylate name, eg, methyl formate for HCOOCH. Amides are named by changing the ending -oic acid to -amide for either systematic or common names, eg, hexanamide and acetamide. 

Step 2 Replace the -oic acid ending of the name of the parent acid with the suffix -amide. 

The suffixes -oic acid, -al, -amide and -nitrile are used to name acyclic compounds having one or two characteristic groups. Locants are not necessary, as these groups must be at the end of a chain. The suffixes -carboxylic acid, -carbaldehyde, -carboxamide and -carbonitrile are used when more than two groups are attached to chains or one or more groups are attached to cycles. 

Amides are named by replacing the -oic acid or -ic acid suffix of the parent carboxylic acids with the suffix -amide, or hy replacing the -carboxylic acid ending with -carboxamide. Alkyl groups on nitrogen atoms are named as substituents, and are prefaced by N-or N,N-, followed by the name(s) of the alkyl group(s). 

The IUPAC rules name amides by appending the suffix -amide to the parent name of the carboxylic acid from which the amide is derived. If there are substituents on the amide nitrogen, they are given the locant N. Three examples are given in Figure 11.56. 

To name a primary amide, first name the corresponding acid. Drop the -ic acid or -oic acid suffix, and add the suffix -amide. For secondary and tertiary amides, treat the alkyl groups on nitrogen as substituents, and specify their position by the prefix N-. 

For acids that are named as alkanecarboxylic acids, the amides are named by using the suffix -carboxamide. Some amides, such as acetanilide, have historical names that are still commonly used. 

The names of peptides reflect the names of the amino acid residues involved in the amide linkages, beginning at the N terminus. All except the last are given the -yl suffix of acyl groups. For example, the following dipeptide is named alanylserine. The alanine residue has the -yl suffix because it has acylated the nitrogen of serine. 

The suffixes -oic acid, -oyl halide, -amide, -nitrile, and -al are used when the functional group is at the end of a carbon chain, as in pentanoic acid. The endings -carboxylic acid, etc., are used when the group is attached to a ring, as in 2-pyridinecarboxylic acid. 

The suffixes for the acids can be modified to indicate the corresponding amide, nitriles, acid halides, etc., e.g., -uronamide, -ononitrile, and -ulosonyl chloride. 

Condensation polymers are named by analogy with the lower molecular weight esters, amides, and so on. Thus, since the names of all esters end with the suffix -ate attached to that of the parent acid (e.g., 1-50)... 

All 1 ° amides are named by replacing the -ic acid, -oic acid, or -ylic acid ending with the suffix amide. 

For secondary, tertiary, and quarternary amines, the naming convention is a bit different, but the suffixes are the same. For symmetrical amines, the di" or "tri" prefix is used depending on whether there are 2 or 3 substituents. For example, dipropylamine or triphenylamine. For asymmetric amines, the parent chain gets the -amine suffix. This name is then prefixed with N- (indicating the nitrogen bond) and the substituent group name, for each substituent, using alphabetic order for tertiary amides. For example, N-ethyl-N-methyl-propylamine, not N-methyl-N-ethyl-propylamine. 

The simplest structure of amides is that in which the nitrogen is bonded to two hydrogen atoms. In order to name these, use the name of the carboxylic acid from which the amide is derived but replace the -ic or -ole suffix with -amide. 

Carboxylic acids are named by adding the suffix oic acid to the base name. Acid chlorides are name by changing the ic acid of the parent carboxylic acid to yl chloride. The suffix acid is changed to anhydride to name acid anhydrides. Esters are named like acid salts by changing ic acid to ate and preceding the name by the name of the alkyl group. To name amides, the oic acid is changed to amide. 

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