Stereochemistry of some substituted 2-furyl-and 2-thienyl ethylene derivatives. 1 H NMR study

M Dandárová, J Kováč, D Végh…

Index: Dandarova, Miloslava; Kovac, Jaroslav; Vegh, Daniel; Zvak, Vladimir Collection of Czechoslovak Chemical Communications, 1982 , vol. 47, # 12 p. 3412 - 3417

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Citation Number: 8

Abstract

Abstract Stereochemistry of (E)-and (Z)-1-(5-nitro-2-furyl)-2-Y-ethylenes and 1-(5-nitro-2- thienyl)-2-Y-ethylenes (where Y= CH 3 O, 4-CH 3 C 6 H 4 O, N 3 and Br) and of E and Z isomers of methyl 2-methyl-3-(2-furyl) propenoate and methyl 2-methyl-3-(2-thienyl) propenoate was studied by 1 H NMR spectroscopy. With 1-(5-nitro-2-furyl)-2-Y-ethylenes, it was found that the preferred conformation of the furyl substituent relative to the side chain ...