New Synthesis of Tetraalkyl 2,3-Dihydro-5-oxopyrrolo[2,1-a]isoindole-1,2,3,3-tetracarboxylates and Tetraalkyl 2,3-Dihydro-5-oxopyrrolo[2,1-a]pyrrolidine-1,2,3,3-tetracarboxylates Mediated by Vinyltriphenylphosphonium Salts
ZAVYALOV S. I.; ZAVOZIN A. G., IZV. AN CCCP. CEP. XIM., 1980, HO 5, 1067-1070
作者:ZAVYALOV S. I.、 ZAVOZIN A. G.
DOI:——
日期:——
Synthesis of 2-hydroxy-3-carbethoxy-5,6-dialkylpyrazines
作者:S. I. Zav'yalov、A. G. Zavozin
DOI:10.1007/bf00949684
日期:1980.5
New Synthesis of Tetraalkyl 2,3-Dihydro-5-oxopyrrolo[2,1-a]isoindole-1,2,3,3-tetracarboxylates and Tetraalkyl 2,3-Dihydro-5-oxopyrrolo[2,1-a]pyrrolidine-1,2,3,3-tetracarboxylates Mediated by Vinyltriphenylphosphonium Salts
作者:Issa Yavari、Abbas Ali Esmaili
DOI:10.1039/a803804j
日期:——
Protonation of the reactive 1:1 intermediate produced in the reaction between triphenylphosphine and dialkyl acetylenedicarboxylates by CH-acids, such as dialkyl phthalimidomalonates and dimethyl succinimidomalonate, leads to a vinylphosphonium salt, which undergoes intramolecular Wittig reaction to produce the title compounds in fairly high yields.