CuI-Catalyzed Cross-Coupling of <i>N</i>-Tosylhydrazones with Terminal Alkynes: Synthesis of 1,3-Disubstituted Allenes
作者:Mohammad Lokman Hossain、Fei Ye、Yan Zhang、Jianbo Wang
DOI:10.1021/jo3024686
日期:2013.2.1
A CuI-catalyzedsynthesis of 1,3-disubstituted allenesfrom1-alkynes by the reaction with various N-tosylhydrazones has been developed. This method, which uses readily available starting materials and is operationally simple, offers 1,3-disubstituted allenes in moderate to good yields. The reaction also tolerates various functional groups.
A new method for synthesis of allenes, including an optically active form, from aldehydes and alkenyl aryl sulfoxides by sulfoxide–metal exchange as the key reaction and an application to a total synthesis of male bean weevil sex attractant
The sulfoxide–metal exchange reaction of β-acetoxy sulfoxides or β-mesyloxy sulfoxides, which were derived from alkenyl aryl sulfoxides and aldehydes in two steps, with a Grignard reagent or alkyllithium at low temperature gave allenes in good yields. Optically active allenes were synthesized starting from optically active 2-substituted ethenyl p-tolyl sulfoxides. A synthesis of (−)-methyl (E)-2,4
A new method for synthesis of allenes, including an optically active form, from aldehydes and alkenyl aryl sulfoxides with carboncarbon bond-formation
作者:Tsuyoshi Satoh、Yuko Kuramochi、Yujiro Inoue
DOI:10.1016/s0040-4039(99)01666-4
日期:1999.12
Ligand exchange reaction of β-mesyloxy sulfoxides or β-acetoxy sulfoxides, which were derived from alkenyl aryl sulfoxides and aldehydes in two steps, with n-BuLi or EtMgBr at low temperature gave allenes in good yields. Opticallyactive allenes were synthesized starting fromopticallyactive 2-phenylethenyl p-tolyl sulfoxides.