Acetonitrile Derivatives as Carbonyl Synthons. One-Pot Preparation of Diheteroaryl Ketones via a Strategy of Sequential S<sub>N</sub>Ar Substitution and Oxidation
作者:Zhiwei Yin、Zhongxing Zhang、John F. Kadow、Nicholas A. Meanwell、Tao Wang
DOI:10.1021/jo030234b
日期:2004.2.1
addition of sodium peroxide and aqueous NH4OAc solution effected oxidation to afford aryl heteroaryl ketones in good yields. Aryl acetonitrile derivatives are thus umpolung-type synthons of the corresponding aryl carbonyl functionality.
2-芳基乙腈衍生物的阴离子与各种杂芳基氯化物或溴化物在S N Ar歧管中反应,得到易于氧化的中间阴离子。加入过氧化钠和NH 4 OAc水溶液进行氧化,以高收率得到芳基杂芳基酮。因此,芳基乙腈衍生物是相应的芳基羰基官能度的umpolung型合成子。
Synthesis, Reactions and Spectroscopy of 3-Benzoyl-6-phenylpyridazines of Expected Biological Activity
作者:Yvette A . Issac
DOI:10.1515/znb-1999-0813
日期:1999.8.1
Phenyl(6-phenyl-pyridazin-3-yl)methanol (3) has been obtained via NaBH4 reduction of ketone 2. Reaction of 2 with hydroxylamine or its O-alkyl analogue has been found to yield 3-benzoyloxime-6-phenylpyridazine (4) and alkyloximes (5), respectively. Treatment of 4 with a mixture of aceticacid and sulfuric acid afforded ketone 2 again and not the rearranged products (6 or 7). Beckmannrearrangement has however been