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Qu'est-ce (qui) est cyclopropane$18427$ - définition
CHEMICAL PROCESS WHICH GENERATES CYCLOPROPANE RINGS
Kishner cyclopropane synthesis
![Structure of U-106305, a derivative of a [[cyclopropane fatty acid]] with six cyclopropane rings, isolated from ''Streptomyces sp''](https://commons.wikimedia.org/wiki/Special:FilePath/U-106305.png?width=200 "Structure of U-106305, a derivative of a [[cyclopropane fatty acid]] with six cyclopropane rings, isolated from ''Streptomyces sp''")
Cyclopropane-fatty-acyl-phospholipid synthase
CLASS OF ENZYMES
EC 2.1.1.79; S-adenozil-L-metionin:unsaturated-phospholipid methyltransferase (cyclizing)
In enzymology, a cyclopropane-fatty-acyl-phospholipid synthase () is an enzyme that catalyzes the chemical reaction
Activation of cyclopropanes by transition metals
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Cyclopropane C-C Activation; Cyclopropane carbon-carbon bond activation
In organometallic chemistry, the activation of cyclopropanes by transition metals is a research theme with implications for organic synthesis and homogeneous catalysis. Being highly strained, cyclopropanes are prone to oxidative addition to transition metal complexes.
Trimethylene
CHEMICAL COMPOUND
Cyclopropanes; Freund reaction; Trimethylene; Cyclolpropane
·noun A gaseous hydrocarbon, C3H6, isomeric with propylene and obtained from it indirectly. It is the base of a series of compounds analogous to the aromatic hydrocarbons.
Wikipédia
Cyclopropanation
In organic chemistry, cyclopropanation refers to any chemical process which generates cyclopropane ((CH2)3) rings. It is an important process in modern chemistry as many useful compounds bear this motif; for example pyrethroids and a number of quinolone antibiotics (ciprofloxacin, sparfloxacin, etc.). However, the high ring strain present in cyclopropanes makes them challenging to produce and generally requires the use of highly reactive species, such as carbenes, ylids and carbanions. Many of the reactions proceed in a cheletropic manner.
