Controlled reduction of tertiary amides to the corresponding aldehydes or amines using dialkylboranes
作者:Gayane Godjoian、Bakthan Singaram
DOI:10.1016/s0040-4039(97)00179-2
日期:1997.3
tertiary amides were reduced using one or two equivalents of various dialkylboranes, such as 9-borabicyclo[3.3.1] nonane (9-BBN), dicyclohexylborane (Chx2BH), or disiamylborane (Sia2BH). The reduction of tertiary amides having alkyl substituents of varying steric requirement at the nitrogen atom, required two equivalents of 9-BBN for complete reduction and gave the corresponding tertiary amines. However
使用一或两个当量的各种二烷基硼烷(例如9-硼环环[3.3.1]壬烷(9-BBN),二环己基硼烷(Chx 2 BH)或二戊基硼烷(Sia 2 BH))还原几种叔酰胺。还原在氮原子上具有不同空间要求的烷基取代基的叔酰胺,需要两当量的9-BBN才能完全还原,并得到相应的叔胺。但是,空间受阻更大的二烷基硼烷(例如Chx 2 BH和Sia 2 BH)与叔酰胺以1:1的化学计量反应,并将它们部分还原为相应的醛。