629
In 1999, the carboxylation of conjugated enynes and diynes (Scheme 23a) to the
carboxylic acid at the atmospheric pressure and temperature were reported.
Ni-(COD) 2 in combination with DBU, the reactions proceed in the selective pathway of terminal alkynes as shown in Scheme 23a [164]. Followed by this, the dicarboxylation of 1,3-dienes with Ni-(COD) 2 catalyst in the presence of dimethyl zinc
is reported under mild condition (Scheme 23b). The reaction proceeds in the stereoselective pathway with the retention of geometrical isomer [165].
Scheme 23 Synthesis of carboxylic acid from alkenes (B–D) and alkynes (A–D) catalyzed
by Ni(0)
Efficient Homogeneous Catalysts for Conversion of CO 2 to Fine Chemicals
In 1999, the carboxylation of conjugated enynes and diynes (Scheme 23a) to the
carboxylic acid at the atmospheric pressure and temperature were reported.
Ni-(COD) 2 in combination with DBU, the reactions proceed in the selective pathway of terminal alkynes as shown in Scheme 23a [164]. Followed by this, the dicarboxylation of 1,3-dienes with Ni-(COD) 2 catalyst in the presence of dimethyl zinc
is reported under mild condition (Scheme 23b). The reaction proceeds in the stereoselective pathway with the retention of geometrical isomer [165].
Scheme 23 Synthesis of carboxylic acid from alkenes (B–D) and alkynes (A–D) catalyzed
by Ni(0)
Efficient Homogeneous Catalysts for Conversion of CO 2 to Fine Chemicals