Stereocontrolled and Versatile Total Synthesis of Bispyrrolidinoindoline Diketopiperazine Alkaloids: Structural Revision of the Fungal Isolate (+)-Asperdimin
作者:Carlos Pérez-Balado、Paula Rodríguez-Graña、Ángel R. de Lera
DOI:10.1002/chem.200901056
日期:2009.9.28
According to this strategy, the natural products (+)‐WIN 64821 1, (+)‐WIN 64745 2 and (+)‐asperdimin 6 as well as analogues (5, 22, 32, 44) with different relative and absolute configuration have been efficiently synthesized. The flexibility of this synthetic methodology has facilitated the structural revision of the natural product (+)‐asperdimin, whose structure has been corrected to diastereomer 6
diketopiperazine rings. Total yields of these alkaloidsyntheses were from 10 up to 27 %. In addition, 1′‐(2‐phenylethylene)‐ditryptophenaline was synthesized by using three one‐pot operations. The studies detailed herein provided synthesized natural products for inhibitory activities of ubiquitin‐specific protease 7 (USP7) and foam cell formation in macrophages. The newly listed biologicalevaluation for tryptophan‐based