Aliphatic and aromaticprimaryselenoamides 2 were isolated by the reaction of the corresponding aliphatic and aromatic nitriles with potassium 4-methylselenobenzoate in the presence of BF3·Et2O in moderate from high yields.
Synthesis of Primary Arylselenoamides by Reaction of Aryl Nitriles with Woollins' Reagent
作者:Guoxiong Hua、Yang Li、Alexandra M. Z. Slawin、J. Derek Woollins
DOI:10.1021/ol062053c
日期:2006.11.9
[Structure: see text] The reaction of aryl nitriles with Woollins' reagent followed by water affords a variety of primary arylselenoamides in 60-100% yield. The first crystal structures of two primary selenoamides are reported.
Synthesis of Primary Selenocarboxamides and Conversion of Alkyl Selenocarboxamides into Selenazoles
作者:Long-Li Lai、David H. Reid
DOI:10.1055/s-1993-25959
日期:——
Nitriles react with sodium hydrogen selenide, pyridine and hydrochloric acid in ethanol to give primary aryl and alkyl selenocarboxamides. The alkyl selenocarboxamides are converted into selenazoles by reaction with phenacyl bromide.
Reaction of nitriles with (Me3Si)2 Se in the presence of BF3·OEt2 afforded the corresponding primary selenoamides in moderate yields. A selenourea and a selenothiocarbamate were also prepared in a similar manner from the corresponding cyanamide and thiocyanate.
Reaction of primary selenoamides with α,β-unsaturated ketones in the presence of BF3·Et2O provided 5,6-dihydro-4H-1,3-selenazine derivatives in high yields. Among the 1,3-selenazine diastereomers bearing two asymmetric carbons at the C4 and C6 positions, the cis form is predominant.