71545-61-4Relevant academic research and scientific papers
HYDRATION TRIMERIZATION OF ACETYLENE IN SUPERBASIC MEDIA. II. CONDITIONS FOR THE SYNTHESIS OF 2-VINYLOXY-1,3-BUTADIENE IN THE ALKALI-DIMETHYL SULFOXIDE SYSTEM
Tarasova, O. A.,Amosova, S. V.,Istomina, S. N.,Trofimov, B. A.
, p. 1231 - 1235 (2007/10/02)
The effects of the nature and concentration of the catalyst (MOH, M = Na, K, Rb, Cs), additions (CuCl, CoCl2, NiCl2, phosphata salts), the ratio of the reagents, temperature, and the contact time on the yield and purity of 2-vinyloxy-1,3-butadiene, obtained in a single stage from acetylene and water in DMSO, were studied.It was established that the potassium hydroxide-potassium phosphate-DMSO system is the optimum system for the synthesis.By the experimental design method it was shown that increase in the C2H2:H2O ratio, increase in the concentrations of potassium hydroxide and potassium phosphate, and decrease in the reaction temperature and time have a favorable effect on the yield and purity of the product.
HYDRATION TRIMERIZATION OF ACETYLENE IN SUPERBASIC MEDIA. I. SYNTHESIS OF 2-VINYLOXY-1,3-BUTADIENE AND IDENTIFICATION OF THE SIDE PRODUCTS
Tarasova, O. A.,Amosova, S. V.,Trofimov, B. A.
, p. 1795 - 1801 (2007/10/02)
In the superbasic potassium hydroxide-dimethyl sulfoxide (DMSO) or potassium hydroxide-triethylphosphine oxide medium at 105 - 145 deg C acetylene undergoes trimerization with the capture of a water molecule to form 2-vinyloxy-1,3-butadiene with yields up to 43percent (the KOH-K3PO4-DMSO system).The following side products are formed (in DMSO): cis-vinyl 1-propenyl ether; 3-vinyloxy-1,2-butadiene; 1,2-di(vinyloxy)propane; 3-ethyl- and 4-ethyl-vinyloxybenzenes; benzene; toluene; vinyl methyl sulfide; divinyl sulfide.
