A new reaction of aryl aldehydes with aryl acetylenes in the presence of boron trihalides.
[reaction: see text]. The reactions of aryl aldehydes with 2 equiv of arylacetylenes in the presence of boron trichloride yield (E,Z)-1,3,5-triaryl-1,5-dichloro-1,4-pentadienes. Reactions carried out in the presence of boron tribromide generate the corresponding (Z,Z)-1,3,5-triaryl-1,5-dibromo-1,4-pentadienes.
Kabalka
George W
GW
Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600, USA. kabalka@utk.edu
Wu
Zhongzhi
Z
Ju
Yuhong
Y