1251936-77-2Relevant academic research and scientific papers
Total synthesis of (+)-perophoramidine and determination of the absolute configuration
Wu, Haoxing,Xue, Fei,Xiao, Xue,Qin, Yong
supporting information; experimental part, p. 14052 - 14054 (2011/01/11)
The first asymmetric total synthesis of (+)-perophoramidine has been achieved in 17 steps with ～11% overall yield. The key step relies on an asymmetric biomimetic Diels-Alder reaction between the in situ-generated chiral diene T-24 and the substituted tryptamine 23 to assemble the core structure 27a in a highly efficient way. An acid-catalyzed thermodynamic equilibrium results in C N double-bond migration of the amidine moiety in 37, which guarantees a regioselective methylation on N1 at the end of the synthesis. The absolute configuration of (+)-perophoramidine was determined by X-ray crystallographic analysis of the chiral intermediate 32 and comparison of the rotation of synthetic (+)-perophoramidine with that of the natural product.
