作者:Andrzej E. Wróblewski、Iwona E. Głowacka
DOI:10.1016/j.tet.2005.09.057
日期:2005.12
(1S,2R,3S)-, (1R,2R,3S)- and (1S,2R,3R)-4-amino-1,2,3-trihydroxybutylphosphonic acids were synthesised. The synthetic strategy involved preparation of the respective 4-azido-2,3-O-isopropylidene-L-threose or -D-erythrose, addition of dialkyl phosphites, separation of C-1 epimeric O,O-dibenzyl phosphonates, the reduction of azides and the removal of the protecting groups. The (2R,3S) and (2R,3R) configurations in the final products were secured by employing diethyl L-tartrate and D-isoascorbic acid as starting materials. The stereochemical course of the addition to the carbonyl groups in 4-azido-2,3-O-isopropylidene-L-threose or -D-erythrose followed that established earlier for 2,3-0-isopropylidene-D-glyceraldehyde and similar (3:1-4:1) diastereoselectivities were achieved. (c) 2005 Elsevier Ltd. All rights reserved.
(1S,2R,3S)-、(1R,2R,3S)-和(1S,2R,3R)-4-氨基-1,2,3-三羟基丁基膦酸被成功合成。该合成策略包括以下步骤:制备相应的4-叠氮-2,3-O-异丙叉基-L-苏 sugar或-D-赤 sugar,添加二烷基次磷酸酯,分离C-1异构体O,O-二苯甲基膦酸酯,还原叠氮基团以及去除保护基团。最终产物中的(2R,3S)和(2R,3R)构型通过使用乙酸-D-异抗坏血酸和(D)-异抗坏血酸作为起始材料来实现。在4-叠氮-2,3-O-异丙叉基-L-苏糖或-D-赤糖的羰基加成过程中,其立体化学路径遵循先前为2,3-O-异丙叉基-D-甘油醛等化合物建立的模式,实现了类似的(3:1-4:1)对映选择性。(C)2005 Elsevier Ltd. 保留所有权利。
注:上述化合物的中文命名可能不完全标准,实际应用中应参考相关化学命名规则和文献。