作者:L. Angiolini、P. Costa Bizzarri、G. Scapini、M. Tramontini
DOI:10.1016/s0040-4020(01)97970-0
日期:1981.1
The stereoselectivity of the title reactions due to a hindering amino group in α-asymmetric aminoketones (1 and 2) and to an asymmetric center far away from the reaction center in β-(methylpiperidino)-ketones (11–14) has been studied. The aminoalcohols obtained (3–8 and 15–22) have been separated in most cases and the relative configurations attributed by NMR. Based on diastereomeric ratios, a N-coordinated
标题反应由于立体选择性阻碍在α-不对称氨基酮(氨基1和2)和一个不对称中心远离反应中心在β-(甲基哌啶) -酮(11 - 14)进行了研究。获得(氨基醇3 - 8和15 - 22)已经在大多数情况下,用NMR归属的相对构型被分离。基于非对映体比率,已经提出了N配位的环状过渡态,并且至少对于β-氨基酮体系上的格氏反应是有效的。