In one study, [ 5 ] helicene was synthesized in an olefin metathesis reaction of a divinyl compound ( prepared from 1, 1'- bi-2-naphthol ( BINOL ) in several steps ), with Grubbs'second generation catalyst:
12.
It was stated that the action of heated sodium hydroxide upon ?, ? `-dichlorodiethyl ether produced a liquid boiling at 39 �C ( among other identified products ) . ( Major, 1935 ) However, in a subtly modified process Hibbert et al . reported the isolation of a product boiling at 34-35 �C, " divinyl ether ".
13.
As a functional group, the synthesis of 2-cyclopentenones is accomplished in a variety of other ways, including the Nazarov cyclization reaction from divinyl ketones, Saegusa Ito oxidation from cyclopentanones, ring-closing metathesis from the corresponding dienes, oxidation of the corresponding cyclic allylic alcohols, and the Pauson Khand reaction from alkenes, alkynes, and carbon monoxide.
14.
This substance produced results placing it between diethyl ether and divinyl ether both in terms of toxicity and speed of induction and recovery, producing promising results similar to V . A . M . ( Grosskreutz, Davis 1956 ) Despite much simpler synthesis ( vinylization of ethanol with acetylene ) ethyl vinyl ether didn't enter widespread use in anasthetics, as superior halogenated ethers replaced it shortly after its first trials.
15.
However, " Prochlorochoccus " has evolved to use a unique light-harvesting complex, consisting predominantly of divinyl derivatives of chlorophyll a ( Chl a2 ) and b ( Chl b2 ) and lacking monovinyl chlorophylls and phycobilisomes . " Prochlorococcus " is the only known wild-type oxygenic phototroph that does not contain Chl a as a major photosynthetic pigment, and is the only known prokaryote with ?-carotene.
