Carbon-carbon bond cleavage of diynes through the hydroamination with transition metal catalysts.
The C-C bond cleavage of terminal and internal diynes takes place readily in the presence of catalytic amounts of Ru3(CO)12 or Pd(NO3)2 and of 2-aminophenol, giving the corresponding benzoxazoles and ketones in good to high yields. There are two different modes of the bond cleavage: (a) an alkyne C-C triple bond is cleaved, and (b) the C-C single bond between the two alkyne groups is cleaved.
Shimada
Tomohiro
T
Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan.
Yamamoto
Yoshinori
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