Triethylaluminum- or Triethylborane-Induced Free Radical Reaction of Alkyl Iodides and α,β-Unsaturated Compounds
作者:Jing-Yuan Liu、Yoeng-Jiunn Jang、Wen-Wei Lin、Ju-Tsung Liu、Ching-Fa Yao
DOI:10.1021/jo020681b
日期:2003.5.1
beta-unsaturated compounds, 1a-c, 9, 13, and 17, were used as reactants in free radical conjugate addition reactions with different radicals generated from alkyliodides such as 3, 4, or 5 in the presence of triethylborane-oxygen in air or via the use of triethylaluminum-benzoyl peroxide as a free radical initiator. When the reactions were carried out using triethylborane-air, the products, in most cases,
One-pot synthesis of malononitriles by free radical reactions of ylidenemalononitrile with Et3B and iodoalkane in a water–ether biphase medium
作者:Zhijay Tu、Chunchi Lin、Yaochung Jang、Yeong-Jiunn Jang、Shengkai Ko、Hulin Fang、Ju-Tsung Liu、Ching-Fa Yao
DOI:10.1016/j.tetlet.2006.06.061
日期:2006.8
The one-pot synthesis of malononitrile derivatives 4, 6, and 7 in moderate to high yields by the reaction of ylidenemalononitriles 3, prepared in situ from carbonyl compounds 1 and malononitrile 2 in the presence of ammonium acetate in aqueous solution at 50–60 °C, with Et3B or RI 5/Et3B in a water–diethyl ether biphase medium under an atmosphere of room temperature is reported. The reaction of Et3B
一锅合成丙二腈衍生物的4,6,和7在中度到高收率由ylidenemalononitriles的反应3中,从羰基原位制备化合物1和丙二腈2在乙酸铵的水溶液在50-60存在°据报道,在室温下,在水-乙醚双相介质中,C与Et 3 B或RI 5 / Et 3 B混合。Et 3 B与金刚烷碘化物8和10在相似条件下的反应得到9和11分别高产。然而,当苯甲醛1a与丙二酸二甲酯12缩合,然后在苯溶液中进行平行自由基处理时,单烷基化与二烷基化的丙二酸酯14结合的收率低。