Cu(OAc)<sub>2</sub>·H<sub>2</sub>O-Promoted Tandem β-Alkynyl Elimination of α- or β-Hydroxy Propargylic Alcohols and Homocoupling of the Resulting Alkynyl Species
作者:Xiangsheng Xu、Zhenyong Huang、Yanfeng Lu
DOI:10.3184/174751913x13739011239995
日期:2013.9
α or β-hydroxy propargylic alcohols undergo tandem C(sp)–C(sp3) bondcleavage via β-alkynyl elimination and homo-coupling of the resulted alkynyl species in the presence of Cu(OAc)2·H2O to produce the corresponding hydroxycarbonyl compounds and 1,3-butadiynes.
Lewis and Brønsted Acid Cocatalyzed Reductive Deoxyallenylation of Propargylic Alcohols with 2-Nitrobenzenesulfonylhydrazide
作者:Zhaohong Liu、Peiqiu Liao、Xihe Bi
DOI:10.1002/chem.201404692
日期:2014.12.22
Reductivedeoxyallenylation of sterically hindered tertiary propargylicalcohols was realized on reaction with 2‐nitrobenzenesulfonylhydrazide (NBSH) by the combined use of Lewis and Brønstedacid catalysts. This method features a broad substrate scope, mild reaction conditions, and good functional‐group tolerance, and affords various mono‐, di‐, and trisubstituted allenes in good‐to‐excellent yields