884-08-2Relevant academic research and scientific papers
Selective dimerisation and addition of carboxylic acids to terminal alkynes, catalysed by thermolysed Grubbs' catalyst: A novel synthesis of enynes and vinyl esters
Melis, Karen,Opstal, Tom,Verpoort, Francis
, p. 3779 - 3784 (2007/10/03)
The transformation of triple bonds of terminal alkynes was carried out at 110 °C in the presence of the thermolysed RuII-alkylidene [Cl2(PCy3)2Ru=CHPh]. The transformation of phenylacetylene is strongly pKa-dependent, the preference switching from vinylation to dimerisation at increasing pKa values. Aliphatic alkynes only give rise to vinylation adducts, with a regioselectivity for Markovnikov addition. Wiley-VCH Verlag GmbH, 69451 Weinheim, Germany, 2002.
Mecanisme d'acetolyse d'esters d'enol styreniques
Montheard, Jean-Pierre,Camps, Marcel,Chatzopoulos, Michel,Benzaid, Ahmed
, p. 109 - 116 (2007/10/02)
We have studied the reaction of enol esters in acidic media: wherein Z = H, CH3, CH2Cl, CHCl2 and CCl3.The raction is first order.Log kex = α H'0 + β (H'0 = acidity function of Hammett) with α-1.A general acid catalysis is observed.Following a discussion of possible SN, AAC2 and ASE2 mechanisms, we propose an ASE2 mechanism for this reaction.
