我们报告了与TMEDA(N,N,N',N'-四甲基乙二胺)络合的无锂盐KDA(二异丙基钾钾;在己烷中0.6 m)的制备及其在(杂)芳烃之间流金属化的用途-78°C和25°C,反应时间介于0.2 s和24 s之间,使用商业流量设置的总流速为10 mL min -1。生成的有机金属钾与各种亲电子试剂立即反应,例如酮,醛,烷基和烯丙基卤化物,二硫化物,Weinreb酰胺和Me 3SiCl,以高收率提供官能化的(杂)芳烃。该流程成功地扩展到了甲基取代的芳烃和杂芳族化合物的侧向金属化反应,从而形成了各种苄基钾有机金属化合物。无需进一步优化就可以进行金属化放大。
(2‐Ethylhexyl)sodium: A Hexane‐Soluble Reagent for Br/Na‐Exchanges and Directed Metalations in Continuous Flow
作者:Johannes H. Harenberg、Niels Weidmann、Alexander J. Wiegand、Carla A. Hoefer、Rajasekar Reddy Annapureddy、Paul Knochel
DOI:10.1002/anie.202103031
日期:2021.6.21
hexane-soluble (2-ethylhexyl)sodium (1) from 3-(chloromethyl)heptane (2) using a sodium-packed-bed reactor under continuous flow conditions. Thus, the resulting solution of 1 is free of elemental sodium and therefore suited for a range of synthetic applications. This new procedure avoids the storage of an alkylsodium and limits the handling of metallic sodium to a minimum. (2-Ethylhexyl)sodium (1) proved to be
Sulfur analogs of psychotomimetic agents. 30. Ethyl homologs of mescaline and their monothioanalogs
作者:Peyton Jacob、Alexander T. Shulgin
DOI:10.1021/jm00373a013
日期:1984.7
monothio analogues of the mono-, di-, and triethoxy homologues of mescaline have been synthesized and pharmacologically evaluated in man. Modifications at the ring position para to the ethylamine chain, either with a sulfur atom, a longer alkyl chain, or both, lead to compounds of high centralnervoussystem activity. The 4-n-propoxy and 4-n-butoxy homologues and their corresponding 4-thio analogues were