Cobalt-Mediated Synthesis of Propargyl Nitriles and α-Alkoxy Propargyl Nitriles
作者:John G. Stuart、Kenneth M. Nicholas
DOI:10.1055/s-1989-27287
日期:——
Dicobalt hexacarbonyl complexes of propargyl acetates and acetylenic acetals couple efficiently with diethylaluminum cyanide to produce the corresponding complexed propargyl nitriles and cyanohydrin derivatives, respectively. A convenient procedure far preparing propargyl nitriles and α-alkoxy propargyl nitriles from propargyl alcohols and acetylenic acetals using this methodology is described.
Synthesis of α-aryl nitriles through B(C6F5)3-catalyzed direct cyanation of α-aryl alcohols and thiols
作者:Gurusamy Rajagopal、Sung Soo Kim
DOI:10.1016/j.tet.2009.03.073
日期:2009.5
Various α-aryl nitriles have been prepared in excellent yield from the corresponding α-aryl alcohols employing 3 mol % of B(C6F5)3 (1) as Lewis acid catalyst and (CH3)3SiCN (TMSCN) as cyanide source. Cyano transfer from TMSCN to alcohol proceeds within short reaction time at rt. α-Aryl thiols also produce corresponding nitriles in good to excellent yield at reflux condition.
使用3 mol%的B(C 6 F 5)3(1)作为路易斯酸催化剂和(CH 3)3 SiCN(TMSCN)作为氰化物,由相应的α-芳基醇以优异的产率制备了各种α-芳基腈。来源。在室温下,在短的反应时间内,从TMSCN转移到乙醇的氰基转移。在回流条件下,α-芳基硫醇还可以产生相应的腈,收率好至极好。