Binaphthyl substituted 1,8-bis(dimethylamino)naphthalenes, the first chiral, atropisomeric, proton sponges
作者:Jean-Paul Mazaleyrat、Karen Wright
DOI:10.1016/j.tetlet.2008.05.042
日期:2008.7
Atropisomeric naphthalene proton sponges (R,S)-3 (meso), (R,R + S,S)-3 (racemic) and (S,S)-3 (enantiopure) were prepared by bis-N,N-dialkylation of 1,8-diaminonaphthalene, using both racemic (R + S)- and enantiopure (S)-2,2′-bis(bromomethyl)-1,1′-binaphthyl, respectively, as alkylating agents. The amino function of the corresponding mono-binaphthyl substituted tertiary/primary diamines (R + S)-4 (racemic)
通过双-N,N-二烷基化制备对映异构萘质子海绵(R,S)-3(内消旋),(R,R + S,S)-3(外消旋)和(S,S)-3(对映纯)分别使用外消旋(R + S)-和对映纯(S)-2,2'-双(溴甲基)-1,1'-联萘作为烷基化剂制备1,8-二氨基萘。相应的单联萘基取代的叔/伯二胺(R + S)-的氨基官能团4(外消旋的)和(小号) - 4(对映体纯),作为副产物获得的,是N,N-二甲基化,得到相应的双(第三)二胺(R + S) - 2和(小号) - 2,分别。内消旋加合物(R,S)-3热异构化成相应的外消旋加合物(R,R + S,S)-3处于固态。所述的可逆进化1(的1 H NMR谱- [R ,小号) - 3,(- [R ,- [R + 小号,S) - 3及(- [R + 小号) - 2在甲苯d 8溶液作为温度的函数,观察到,示出的构象变化,但没有联萘骨架的异构化。在所有情况下,质子化二胺的1