作者:K. Utimoto、N. Sakai、M. Obayashi、H. Nozaki
DOI:10.1016/0040-4020(76)80002-6
日期:1976.1
Reaction of 2-bromo-6-lithiopyridine with trialkylboranes affords 5-alkyl-5-dialkylboryl-2-(Z), 4(E)- pentadienenitriles by stereospecific alkylative cleavage of the pyridine ring. These intermediary vinylboranes are versatile reagents for the preparation of 5-alkyl-2(Z), 4(E)-pentadienenitriles, 5,5-dialkyl-4-pentenenitriles and 5,5-dialkyl-2,4-pentadienenitriles.
2-溴-6-硫代吡啶与三烷基硼烷的反应通过吡啶环的立体定向烷基化裂解得到5-烷基-5-二烷基硼基-2-(Z),4(E)-戊二烯腈。这些中间体乙烯基硼烷是用于制备5-烷基-2(Z),4(E)-戊二烯腈,5,5-二烷基-4-戊烯腈和5,5-二烷基-2,4-戊二烯腈的通用试剂。