New method for the synthesis of α-chlorocinnamonitriles
作者:V. G. Nenajdenko、A. V. Shastin、I. V. Golubinskii、O. N. Lenkova、E. S. Balenkova
DOI:10.1023/b:rucb.0000024853.81460.6a
日期:2004.1
A novel method for the preparation of nitriles of α-chlorocinnamic acid fromaldehydes and ketones was proposed. Transformation of carbonyl compounds into hydrazones followed by treatment of the reaction mixture with CCl3CN in the presence of copper chloride(i) yields α-chlorocinnamonitriles.
Chemo-and stereoselectivity of the reaction of aromatic aldehydes with triphenylphosphine and trichloroacetic acid derivatives
作者:E. D. Matveeva、A. S. Erin、A. G. Osetrov、I. F. Leshcheva、A. L. Kurts
DOI:10.1134/s1070428006030080
日期:2006.3
Aromatic aldehydes react with triphenylphosphine and ethyl trichloroacetate or trichloroacetonitrile to give the corresponding benzylidene dichlorides or alpha-chlorocinnamic acid derivatives. The chemo- and regioselectivity of these reactions depend on both the substituent in the aromatic ring and reaction conditions. The product configuration was determined on the basis of the coupling constans (2)J(CH) and (3)J(CH) in the C-13 NMR spectra.