Catalyst-free chemo-/regio-/stereo-selective amination of alk-3-ynones. Synthesis of 1,5-benzodiazepines and 3-amino-2-alkenones
作者:Agnes Solan、Bilal Nişanci、Miranda Belcher、Jonathon Young、Christian Schäfer、Kraig A. Wheeler、Béla Török、Roman Dembinski
DOI:10.1039/c3gc41898g
日期:——
alk-3-yn-1-ones with o-phenylenediamines provides an effective method with high atom economy for the synthesis of diversely substituted benzodiazepines and conjugated enaminones. This microwave-accelerated reaction proceeds in ethanol in the absence of a catalyst and leads to benzyl-substituted 1,5-benzodiazepines with good yields (70–92%). A room temperature protocol with the same set of reagents (stabilized
烷-3-炔-1-酮与邻苯二胺的反应为合成不同取代的苯并二氮杂卓和共轭的烯胺酮提供了一种具有高原子经济性的有效方法。在没有催化剂的情况下,这种微波加速的反应在乙醇中进行,并导致苄基取代的1,5-苯并二氮杂卓,收率高(70-92%)。在室温条件下,使用相同的试剂组(用三乙胺稳定)可得到烯酮(3-氨基-2-烯酮,占70-99%)。互变异构体形成,并且区域选择性和方法的立体化学是由2-(4-甲基苄基)的X射线晶体结构测定证实-4-苯基-3- ħ -苯并[ b ] [1,5]二氮杂和(Z)-3-[((2-氨基-4,5-二甲基苯基)氨基] -4-(4-叔丁基苯基)-1-(4-氯苯基)-2--2--1-。
Regioselective “hydroamination” of alk-3-ynones with non-symmetrical o-phenylenediamines. Synthesis of diversely substituted 3H-1,5-benzodiazepines via (Z)-3-amino-2-alkenones
作者:Jonathon Young、Christian Schäfer、Agnes Solan、Anthony Baldrica、Miranda Belcher、Bilal Nişanci、Kraig A. Wheeler、Evan R. Trivedi、Béla Török、Roman Dembinski
DOI:10.1039/c6ra24291j
日期:——
Reaction of alk-3-yn-1-ones with non-symmetrical o-phenylenediamines provides an effective method with high atom economy for the synthesis of diversely substituted1,5-benzodiazepines and conjugated enaminones.