Search results
Results from the WOW.Com Content Network
Cyclopropane was introduced into clinical use by the American anaesthetist Ralph Waters who used a closed system with carbon dioxide absorption to conserve this then-costly agent. Cyclopropane is a relatively potent, non-irritating and sweet smelling agent with a minimum alveolar concentration of 17.5% [9] and a blood/gas partition coefficient ...
Cyclopropane derivatives are numerous. [4] Many biomolecules and pharmaceutical drugs feature the cyclopropane ring. Famous example is aminocyclopropane carboxylic acid, which is the precursor to ethylene, a plant hormone. [5] The pyrethroids are the basis of many insecticides. [6] Several cyclopropane fatty acids are known.
Main page; Contents; Current events; Random article; About Wikipedia; Contact us; Pages for logged out editors learn more
In organic chemistry, cyclopropanation refers to any chemical process which generates cyclopropane ((CH 2) 3) rings.It is an important process in modern chemistry as many useful compounds bear this motif; for example pyrethroid insecticides and a number of quinolone antibiotics (ciprofloxacin, sparfloxacin, etc.).
malvalic acid, a cyclopropene fatty acid. Cyclopropene fatty acids are even rarer than CPAs. The best-known examples are malvalic acid and sterculic acid.Sterculic acid as its triglyceride is present in sterculia oils and at low levels in the seed oil of species of Malvaceae [a] (~12%), cottonseed oil (~1%), and in the seeds of the tree Sterculia foetida (~65-78%).
Because of the large ring strain energy of cyclopropanes (29.0 kcal per mole), they are often used as substrates for C-C activation through oxidative addition of a transition metal into one of the three C-C bonds leading to a metallacyclobutane intermediate. Substituents on the cyclopropane affect the course of its activation. [3]
3-Carene is a bicyclic monoterpene consisting of fused cyclohexene and cyclopropane rings. It occurs as a constituent of turpentine, [2] with a content as high as 42% depending on the source. Carene has a sweet and pungent odor, [3] best described as a combination of fir needles, musky earth, and damp woodlands. [4]
The medicinal use of the trifloromethyl group dates from 1928, although research became more intense in the mid-1940s. [2] The trifluoromethyl group is often used as a bioisostere to create derivatives by replacing a chloride or a methyl group.