Synthesis and non-linear properties of disubstituted diphenylacetylene and related compounds
作者:Koichi Kondo、Takumi Fujitani、Noriaki Ohnishi
DOI:10.1039/a606915k
日期:——
A variety of disubstituted diphenylacetylenes and related compounds
have been synthesized by a modified Horner–Emmons reaction, and
their second harmonic generation (SHG) has been evaluated by the Kurtz
powder method. The diphenylacetylenes with weak electron-donating and
-withdrawing groups are found to be efficient for SHG, as well as having
the lowest cut-off wavelength.
Highly efficient synthesis of 1,2-disubstituted acetylenes derivatives from the cross-coupling reactions of 1-bromoalkynes with organotitanium reagents
作者:Chuan Wu、Qing-Han Li
DOI:10.1016/j.tet.2021.132370
日期:2021.9
A Highly efficient route for the synthesis of 1,2-disubstituted acetylene derivatives has been developed by nickel catalyzed cross-couplings of alkynyl halides with aryl titanium reagents under mild conditions. This has given corresponding cross-coupling products good to excellent isolated yields of up to 92 %. The aryls bearing electron-donating or electron-withdrawing groups in either alkynylhalides
A rhodium-catalyzed decarbonylation/alkyne insertion cascade of phthalimides has been established. The reaction can be carried out in an operationally simple manner and provides expedient access to a series of isoquinolones in moderate to good yields. This reaction proceeded through a sequential decarbonylation/alkyne insertion/intramolecular annulation procedure and featured good functional group
Synthesis of Benzofulvene Derivatives from Diarylacetylenes via Pd(II)-Catalyzed Alkyne-Directed C(sp<sup>2</sup>)–H Bond Activation
作者:Biao Guo、Liyao Zheng、Lei Zhang、Ruimao Hua
DOI:10.1021/acs.joc.5b01304
日期:2015.8.21
synthesis of benzofulvene derivatives from easily available diarylacetylenes has been developed. The reaction proceeds through rarely reported carboxylate-assisted alkyne-directed ortho-C(sp2)–H palladation followed by insertion of another diarylacetylene.