Synthesis of 4-Ynamides and Cyclization by the Vilsmeier Reagent to Dihydrofuran-2(3<i>H</i>)-ones
作者:Zhaocheng Zhang、Rapolu Kiran Kumar、Guangzhi Li、Dongmei Wu、Xihe Bi
DOI:10.1021/acs.orglett.5b03189
日期:2015.12.18
The room-temperature nucleophilic addition of vinyl azides to propargylic alcohols under BF3 center dot Et2O catalysis provides an efficient synthesis of 4-ynamides. The procedure is operationally convenient, shows broad substrate scope, and is viable for the synthesis of multifunctional 4-ynamides. Further, a Vilsmeier intramolecular cyclization of 4-ynamides into dihydrofuran-2(3H)-ones has also been discovered, which represents the first report of alkynes being used as the nucleophiles in Vilsmeier-type reactions.
ADEGOKE, EMMANUEL A.;EMOKPAE, T. A.;EPHRAIM-BASSEY, H.;OYELOLA, C. A., J. HETEROCYCL. CHEM., 24,(1987) N 6, 1705-1708
作者:ADEGOKE, EMMANUEL A.、EMOKPAE, T. A.、EPHRAIM-BASSEY, H.、OYELOLA, C. A.
DOI:——
日期:——
Adegoke, Emmanuel A.; Emokpae, T. A.; Ephraim-Bassey, H., Journal of Heterocyclic Chemistry, 1987, vol. 24, p. 1705 - 1708
作者:Adegoke, Emmanuel A.、Emokpae, T. A.、Ephraim-Bassey, H.、Oyelola, C. A.