Phosphine organocatalysis enabled vicinal acylcyanation of alkynoates with acyl cyanides to form acrylonitrile derivatives with a tetrasubstituted alkene moiety. The acyl and cyano groups were introduced at the α and β carbon atoms, respectively, of the C–C triple bond in the alkynoates with complete regioselectivity and high anti stereoselectivity. A variety of functional groups in the acyl cyanides
Phosphane-mediated cyclizations between α-keto nitriles and methylidenemalononitriles, producing highly functionalized cyclopropanes in good to excellent yields, are reported. The presence of strongly electron-withdrawing cyano groups directly bound to the ketone carbonyl groups is believed to play a critical role in these transformations.
HAERLE, H.;JOCHIMS, J. C., CHEM. BER., 1986, 119, N 4, 1400-1412
作者:HAERLE, H.、JOCHIMS, J. C.
DOI:——
日期:——
Haerle, Helmut; Jochims, Johannes C., Chemische Berichte, 1986, vol. 119, # 4, p. 1400 - 1412
作者:Haerle, Helmut、Jochims, Johannes C.
DOI:——
日期:——
The reaction of acyl cyanides with “Huisgen zwitterion”: an interesting rearrangement involving ester group migration between oxygen and nitrogen atoms
作者:Xu-Guang Liu、Yin Wei、Min Shi
DOI:10.1039/b913196e
日期:——
novel rearrangementinvolving ester group migration was found in the reaction of acyl cyanides and Huisgen zwitterions, affording hydrazone derivatives at higher temperature (90 °C) and azine derivatives at lower temperature (20 °C), respectively. Interestingly, the reaction temperature is identified as a critical factor to control the final products. Presumably, the rearrangementinvolving ester group