作者:Zhang, Heyanhao、He, Jintao、Cheng, Rongqian、Yan, Huanren、Tang, Mei-Lin、Chang, Jun
DOI:10.1021/acs.oprd.4c00271
日期:——
Oligomeric proanthocyanidins (OPCs) have a variety of biological functions, but the formation of 4,8-interflavan bonds faces scaling-up difficulties due to the challenging control of stereoselectivity and the degree of polymerization. Here we report a process to produce procyanidin B3 (1) by mainly optimizing the condensation reaction and improving benzylation, C4 activation, and one-pot hydrogenolysis
低聚原花青素 (OPC) 具有多种生物学功能,但由于立体选择性和聚合度的控制具有挑战性,4,8-间黄烷键的形成面临放大困难。在这里,我们报道了一种主要通过优化缩合反应和改进苄基化、C4活化和一锅氢解反应来生产原花青素B3 (1)的工艺。在优化的七步工艺中,在多酚结晶度较差的情况下,仅通过一步色谱即可得到产物1。该策略提供了标题化合物和其他 C4-C8 连接 OPC 的立体选择性合成的有效途径。