88445-04-9Relevant articles and documents
Improved synthesis of tertiary propargyl alcohols by the Favorskii reaction of alkyl aryl (hetaryl) ketones with acetylene
Shmidt,Bidusenko,Protsuk,Mikhaleva,Trofimov
, p. 8 - 11 (2013)
Alkyl aryl (hetaryl) ketones react with acetylene under atmospheric pressure in the superbasic system KOH-EtOH-H2O-DMSO at 10-15 C (2 h) to give the corresponding tertiary propargyl alcohols in up to 91% yield. The procedure requires no large excess of KOH and low-boiling inflammable solvents, produces few wastes, and is safe and convenient on the laboratory scale; there are no limitations for its large-scale application.
Hydrolytic Resolution of Tertiary Acetylenic Acetate Esters With the Lipase from Candida Cylindracea
O'Hagan, David,Zaidi, Naveed A.
, p. 947 - 949 (2007/10/02)
The kinetic resolution of a series of tertiary acetylenic acetate esters using the lipase from Candida cylindracea has been explored.Compounds 6c and the trifluoromethyl acetate 6e have been resolved with high enantiomeric enrichment.Several other tertiary acetate esters carrying a CF3 group have been investigated which proved inert to enzymatic hydrolysis.From these results and published data, we are able to propose a predictive model for identifying the preferred enantiomer of secondary and tertiary trifluoromethyl acetate esters for this lipase.
Optically active propargyl alcohol derivative and a method for preparation of the same
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, (2008/06/13)
An optically active propargyl alcohol derivative of the formula (I) STR1 wherein X=phenyl or thienyl and R=lower alkyl, halogenated methyl, phenyl or substituted phenyl having at least one lower alkyl radical and or halogen atom, is prepared by contacting a racemic modification of l- and d-isomers of the formula (I) with l-brucine in an organic solvent, by separating the resultant deposited diastereomer from a solution containing the resultant other diastereomer in the organic solvent, by decomposing each diastereomer with an aqueous mineral acid solution in the presence of an organic solvent capable of dissolving the corresponding optically active isomer dissociated from the diastereomer and incompatible with water so as to allow the optically active isomer to be dissolved in the water-incompatible organic solvent, and by recovering the optically active isomer from the solution thereof.