Asymmetric transformation (deracemisation) of an atropisomeric bisheterocyclic amine†
作者:Michael P. Coogan、Emma Smart、David E. Hibbs
DOI:10.1039/a905018c
日期:——
Heating (±)-6,8,14,17-tetrahydro-7H-[1,2,5]triazepino[3,2-bâ¶7,1-bâ²]diquinazoline-14,17-dione 1 with (+)-CSA gives (â)-1 with >90% ee via a crystallisation-induced asymmetric transformation, the first non-racemic example of a C2 symmetric bisheterocycle which is atropisomeric by virtue of retarded rotation around an NâN bond.
加热 (±)-6,8,14,17-四氢-7H-[1,2,5]三氮杂[3,2-b-7,1-b-2]二喹唑啉-14,17-二酮 1与 (+)-CSA 结合,通过结晶诱导的不对称转化得到 (-)-1,其 ee > 90%,这是 C2 的第一个非外消旋例子对称双杂环,由于绕 N−N 键旋转延迟而呈阻转异构体。