100340-47-4Relevant academic research and scientific papers
New and efficient procedures for the synthesis of stereodefined 2-(hetero) aryl and 2-methyl substituted alkyl 2-alkenoates having very high stereoisomeric purity
Rossi, Renzo
, p. 4495 - 4498 (1992)
Stereodefined 2-(hetero)aryl and 2-methyl substituted alkyl 2-alkenoates of general formulai and2 have been synthesized with a high degree of stereoselectivity as well as in good overall yields starting from alkyl 2-alkynoates,4.
Palladium-catalyzed reaction between aryl or alkenyl halides and (1-carbalkoxy-1-alkenyl)zinc iodides. A new class of unmasked β-substituted acrylate α-anion equivalents
Rossi, Renzo,Carpita, Adriano,Bellina, Fabio,Cossi, Paolo
, p. 33 - 43 (2007/10/02)
Unmasked β-substituted acrylate α-anion equivalents have been directly and very efficiently prepared by insertion of zinc metal into the carbon-iodine bonds of alkyl (E)- or (Z)-2-iodo-2-alkenoates, (E)- or (Z)-(4), respectively.The stereoisomeric composi
Trisubstituted Olefins via Ester-Derived (Silyloxy)acetylenes: A Highly Stereoselective Alternative to the Horner-Wadsworth-Emmons Reaction
Kowalski, Conrad J.,Sakdarat, Santi
, p. 1977 - 1979 (2007/10/02)
Crude ((triisopropylsilyl)oxy)acetylenes 2, prepared in one step from common esters 1, react with aldehydes in 60-65 percent overall yield after methanol quench to afford α,β-unsaturated esters 3 with very high E/Z stereoselectivity.
ETUDE DE LA REACTION CHLOROCARBENE-ACETALS DE CETENES. II. STEREOSELECTIVITE DE LA REACTION.
Rousseau, G.,Slougui, N.
, p. 2653 - 2664 (2007/10/02)
We have studied the stereoselectivity of the addition reaction of chloro and chloromethyl carbenoids with ketene alkylsilyl acetals.The best stereoselectivity was generally observed with the dimethyl tertiobutylsilyloxy group.With the chlorocarbenoid, using an E ketene acetal we obtained in majority (ca. 80percent) an E α,β-ethylenic ester and using a Z ketene acetal we obtained in majority (ca. 70percent) a Z α,β-ethylenic ester.In the case of the chloromethyl carbenoid the two ketene acetal isomers led to the same α-substituted α,β-ethylenic ester (ca. 88percent of selectivity).With the chlorophenylcarbenoid, formation of ca. 90percent of E α phenyl α,β-ethylenic ester is observed.
