Divergent 2‐Chloroquinazolin‐4(3
<i>H</i>
)‐one Rearrangement: Twisted‐Cyclic Guanidine Formation or Ring‐Fused
<i>N</i>
‐Acylguanidines via a Domino Process
作者:Gang Yan、Bereket L. Zekarias、Xiaoyu Li、Victor A. Jaffett、Ilia A. Guzei、Jennifer E. Golden
DOI:10.1002/chem.201905219
日期:2020.2.21
rearrangement/intramolecular cyclization, gated through (E)‐twisted‐cyclic guanidines, to afford ring‐fused N‐acylguanidines. This scalable, structurally tolerant transformation generated 55 guanidines and delivered twisted‐cyclic guanidines with robust plasma stability and an abbreviated total synthesis of an antitumor ring‐fused guanidine (4 steps, 55 % yield).
开发了一种高效的 2-氯喹唑啉-4(3 H )-酮重排,可预测地在一次操作中产生扭曲的环状或稠合的胍,这取决于伴随的二胺试剂中伯胺与仲胺的存在。2-氯喹唑啉酮与仲二胺的配对导致扭曲环状胍的独特形成。使用含伯胺的二胺允许多米诺喹唑啉酮重排/分子内环化,通过 ( E )-扭曲的环状胍进行门控,得到环稠合的N‐酰基胍。这种可扩展的、结构耐受的转化产生了 55 种胍,并提供了具有强大血浆稳定性的扭曲环状胍和一种抗肿瘤环稠合胍的简化全合成(4 步,55% 收率)。