72036-33-0Relevant articles and documents
Cationic rhodium(I) complex-catalyzed [3 + 2] and [2 + 1] cycloadditions of propargyl esters with electron-deficient alkynes and alkenes
Shibata, Yu,Noguchi, Keiichi,Tanaka, Ken
supporting information; experimental part, p. 7896 - 7898 (2010/08/05)
A cationic rhodium(I) complex, [Rh(cod)2]SbF6, catalyzes the [3 + 2] cycloaddition of propargyl esters with dialkyl acetylenedicarboxylates in good yields, presumably through carbonyl-stabilized cationic rhodium(I) alkenylcarbene intermediates. The same rhodium(I) complex also catalyzes the [2 + 1] cycloaddition (cyclopropanation) of propargyl esters with N,N-disubstituted acrylamides in good yields with perfect diastereoselectivity.
Stereoselective synthesis of (Z)-α-(alkoxycarbonyl)methylene β- and γ-lactones by palladium-catalysed oxidative carbonylation of alkynols
Gabriele, Bartolo,Salerno, Giuseppe,De Pascali, Francesca,Costa, Mirco,Chiusoli, Gian Paolo
, p. 147 - 154 (2007/10/03)
(Z)-α-(Alkoxycarbonyl)methylene β- and γ-lactones can be obtained in fair to excellent yields and with high catalytic efficiencies by PdI2/KI-catalysed oxidative dialkoxycarbonylation of propynyl alcohols (α,α-dialkyl substituted, or α-monoalky
Synthesis of Alkyl 4-Hydroxy-2-alkynoates
Midland, M. Mark,Tramontano, Alfonso,Cable, John R.
, p. 28 - 29 (2007/10/02)
The lithium acetylide anion of ethyl or methyl propiolate is readily prepared by the addition of n-butyllithium to ethyl or methyl propiolate at low temperature.The anion rapidly adds to a variety of aldehydes or ketones to give ethyl or methyl 4-hydroxy-2-alkynoates in high yield.
