Regioselective electrochemical radical cascade cyclization of internal alkynes to selenated and trifluoromethylated dihydropyran
作者:Mingming Yu、Tiantian Huang、Lin Zhang、Muhammad Shabbir、Yuhan Gao、Yi-Hung Chen、Hong Yi、Aiwen Lei
DOI:10.1007/s11426-023-1703-8
日期:2023.11
trifluoromethylated DHP compounds. The reaction proceeded smoothly under mild electrolysis conditions. The broad substrate scope (>50 examples) and scalablesynthesis demonstrated the complexity-building potential of the strategy. Initial mechanistic studies reveal that cyclization may involve a radical process. This protocol may promote the further development of diversified synthesis of multi-substituted dihydropyran
D2O as a deuterium source, a method for the deuteration of intra- and extra-cyclic methylene has been developed for cyclic ethers with moderate yield and excellent deuterium incorporation. This transformation features superb functional group tolerance in a wide range of alkynols. Notably, the critical factor to achieve high deuterium incorporation is determined by the hydrogen isotope exchange reaction
An 8-endo selective Friedel-Crafts cyclization of vinyloxirane 8 with CO2(CO)6-complexed benzeneacetylene was found to give poly-functional eight-membered cyclic compound 9 in high yields. (C) 2008 Elsevier Ltd. All rights reserved.
Enantioselective Intramolecular Friedel−Crafts-Type α-Arylation of Aldehydes
作者:K. C. Nicolaou、Rüdiger Reingruber、David Sarlah、Stefan Bräse
DOI:10.1021/ja902682t
日期:2009.5.13
The enantiospecific Nicholas reaction
作者:Alexander V. Muehldorf、Angel Guzman-Perez、Arthur F. Kluge
DOI:10.1016/s0040-4039(00)78489-9
日期:1994.11
The enantiospecific Nicholas reaction, i.e. cobalt-promoted Friedel-Crafts reaction leading from chiral reactant to chiral product, was demonstrated for the first time.