作者:M. Mikołajczyk、S. Grzejszczak、A. Zatorski、B. Mlotkowska、H. Gross、B. Costisella
DOI:10.1016/0040-4020(78)87003-3
日期:1978.1
A new and general synthesis of ketene S,S-thioacetals (1) and ketene O.S-thioacetals (6) which involves the Horner-Wittig reaction of carbonyl compounds with the metallated S,S- and O,S-thioacetals of formyl-phosphonates (4 and 5) is described. The Horner-Wittig reaction of 4 with aromatic aldehydes can be carried out under two-phase conditions. The generation of the carbanions from 4 and 5 as well
烯酮S,S-硫缩醛(1)和烯酮OS-硫缩醛(6)的新的合成方法,涉及羰基化合物与甲酰基膦酸酯的金属化S,S-和O,S-硫缩醛的Horner-Wittig反应(4和5)被描述。4与芳族醛的霍纳-维蒂希反应可以在两相条件下进行。通过低温31 P NMR光谱研究了4和5中碳负离子的生成以及它们与羰基化合物的反应过程。已发现,甲酰基膦酸酯的S,S-硫缩醛(4)与甲膦酸酯的O,S-硫缩醛(5)相比非常容易金属化。)仅在用叔丁基锂处理时才能形成锂衍生物。从31 P NMR光谱中未获得证据支持形成甲酰基膦酸酯的0-0-缩醛的锂衍生物(12)。