Stereoselective Pinacol Coupling of (Propargyl aldehyde)Co<sub>2</sub>(CO)<sub>6</sub> Complexes
作者:K. Lake、M. Dorrell、N. Blackman、M. A. Khan、K. M. Nicholas
DOI:10.1021/om030392t
日期:2003.10.1
Propargyl aldehyde complexes, (RC⋮CCHO)Co2(CO)6 (1a−c; R = Ph, Me, H), undergo pinacol coupling with a variety of reductants, exclusively giving syn (dl)-diacetylenic diol complexes 2a−c. The X-ray structures of 2a and 2c have been determined. The free diol syn-PhC⋮C−CH(OH)CH(OH)−C⋮CPh (4a) is obtained efficiently from its cobalt complex 2a upon treatment with (NH4)2Ce(NO3)6.
炔丙基醛配合物,(RC⋮CCHO)有限公司2(CO)6(1A - C ^ ; R =苯基中,Me,H),频哪醇离岗与多种还原剂的耦合,专门给出顺式(DL) -diacetylenic二醇络合物2A - c。已经确定了2a和2c的X射线结构。游离二醇顺-PhC⋮C-CH(OH)CH(OH)-C⋮器CPh(4A从其钴络合物有效地获得)图2A处理后用(NH 4)2 Ce(上NO 3)6。