What is gamma lactam?
The γ-lactam moiety is present in a large number of natural and non-natural biologically active compounds. The range of biological activities covered by these compounds is very broad. Functionalized γ-lactams are thus of high interest and have great potential in medicinal chemistry.
What is a Delta lactam?
delta-lactam. Definition. A lactam in which the amide bond is contained within a six-membered ring, which includes the amide nitrogen and the carbonyl carbon.
What is lactam form?
A lactam is acetone + amide. a cyclic amide, formally derived from an amino alkanoic acid. The term is a portmanteau of the words. Lactams form by the acid-catalyzed rearrangement of oximes in the Beckmann rearrangement. Lactams form from cyclic ketones and hydrazoic acid in the Schmidt reaction.
What is Alpha lactam?
alpha-lactam (plural alpha-lactams) (organic chemistry) A lactam having a three-membered ring structure.
What are beta lactam antibiotics examples?
Beta-lactam antibiotics include penicillins, cephalosporins and related compounds. As a group, these drugs are active against many gram-positive, gram-negative and anaerobic organisms.
What is a lactam in chemistry?
A lactam or cyclic amide is an amide in the molecule of which there are one or two carbon chains connecting the carbonyl carbon to the nitrogen atom.
What is a cyclic amide?
What is the functional group of lactam?
One kind of compound categorized by functional group is an amide. An amide results when an organic acid group reacts with a nitrogen-containing amine group and loses water. A lactam is a special kind of amide. It may serve as an intermediate in forming heterocyclic rings.
What is beta-lactam ring?
A beta-lactam (β-lactam) ring is a four-membered lactam. A lactam is a cyclic amide, and beta-lactams are named so because the nitrogen atom is attached to the β-carbon atom relative to the carbonyl. The simplest β-lactam possible is 2-azetidinone.
What is secondary amide?
Secondary amide (2o amide): An amide in which the nitrogen atom is directly bonded to two carbon atoms: the carbonyl group carbon plus one other carbon. General secondary amide structure. C = any carbon group. X = any atom but carbon; usually hydrogen. Z = any carbon group or hydrogen.
What are gamma lactones?
ChEBI ASCII Name. gamma-lactone. Definition. A lactone having a five-membered lactone ring.
Why is gamma lactone more stable?
The most stable structure for lactones are the 5-membered γ-lactones and 6-membered δ-lactones because, as in all organic cycles, 5 and 6 membered rings minimize the strain of bond angles.
Why is penicillin a beta-lactam?
Penicillin and most other β-lactam antibiotics act by inhibiting penicillin-binding proteins, which normally catalyze cross-linking of bacterial cell walls. In the absence of β-lactam antibiotics (left), the cell wall plays an important role in bacterial reproduction.
What is beta-lactam and non beta-lactam?
One common alternative to penicillins is a non-β-lactam antibiotic called vancomycin (Vancocin), which was originally approved for use in 1958. After its initial introduction it was superseded by the β-lactams that provided a cheaper and less toxic alternative to treat bacterial infections.