207352-09-8Relevant articles and documents
Nucleophilic Migratory Cyclopropenation of Activated Alkynes: A Nonmetal Approach to Unbiased Cyclopropenes
Tan, Pengwei,Wang, Haoran,Wang, Sunewang R.
, p. 2590 - 2594 (2021)
An unprecedented reductive [2 + 1] annulation of α-keto esters with alkynones mediated by P(NMe2)3 is described. Although this nonmetal cyclopropenation is a nucleophilic process, attributed to the ester migration via a formal [2 + 2] cycloaddition reaction of Kukhtin-Ramirez adducts and alkynones followed by a fragmentation, cyclopropenes with an unbiased alkene scaffold are formed in good to excellent yields, thus providing a promising complementarity to electrophilic metal-catalyzed cyclopropenation.
Direct synthesis of highly substituted furans from acyloins and active methylene compounds catalyzed by bismuth triflate
Komeyama, Kimihiro,Ohama, Yuuki,Takaki, Ken
supporting information; experimental part, p. 1103 - 1104 (2011/11/06)
Bi(OTf)3 was found to be an effective catalyst for a tandem condensation/cyclization of acyloins and β-diketones or β-keto esters to afford highly substituted furans in good yields.