Total Synthesis of (+)-Batzelladine A and (−)-Batzelladine D, and Identification of Their Target Protein
作者:Jun Shimokawa、Takanori Ishiwata、Koji Shirai、Hiroyuki Koshino、Aya Tanatani、Tadashi Nakata、Yuichi Hashimoto、Kazuo Nagasawa
DOI:10.1002/chem.200500852
日期:2005.11.18
Asymmetric total synthesis of batzelladine A (1) and batzelladine D (2) has been achieved. Our synthesis of batzelladines features 1) stereoselective construction of the cyclic guanidine system by means of successive 1,3-dipolar cycloaddition reaction and subsequent cyclization, 2) direct esterification of the bicyclic carboxylic acid 35 with the guanidine alcohol 8 or 59 to construct the whole carbon
batzelladine A(1)和batzelladine D(2)的不对称全合成已实现。我们合成的batzelladines具有以下特征:1)通过连续的1,3-偶极环加成反应和随后的环化反应,立体选择性地构建环胍体系; 2)将双环羧酸35与胍醇8或59直接酯化,以构建整体巴茨拉定的碳骨架,以及3)由伯醇47与四正丙基过钌酸铵(TPAP)一步形成α,β-不饱和醛53,为巴茨拉定的左手双环胍醇提供了一条有效途径A(1)。手中拿着合成化合物1和2,使用固定的CD4和gp120亲和力凝胶检查了它们的靶蛋白。