Preparation of α,n-dilithiotoluene equivalents. Synthesis of tamoxifen
作者:Miguel Yus、Diego J Ramón、Inmaculada Gómez
DOI:10.1016/s0040-4020(03)00428-9
日期:2003.4
at −78°C yields the expected (lithiooxymethyl)phenyllithium derivative, which is trapped by reaction with different ketones. The subsequent arene-catalysed lithiation at 25°C permits the one-pot chemoselective lithiation of the primary benzyl alcoholate in the presence of a tertiary one. These new functionalised benzyllithium derivatives react with different electrophilic compounds, such as aldehydes
与氯苄基醇的连续反应Ñ丁基锂和锂粉末在4,4'-二-亚化学计量量的存在下叔在-78°C时,丁基丁基联苯(DTBB)产生所需的(硫代氧甲基)苯基锂衍生物,该衍生物通过与不同的酮反应而被捕集。随后在25°C的芳烃催化的锂化反应使叔苄醇盐在叔胺存在下进行一锅化学选择性锂化反应。这些新的官能化的苄基锂衍生物与不同的亲电子化合物(例如醛,酮和三甲基氯硅烷)反应,在水解后得到预期的官能化的苄醇。这些醇中的一些通过酸处理成功地转化为单烯烃或二烯烃。整个策略可用于制备抗癌药物他莫昔芬。