The synthesis of two novel glyceraldehyde surrogates, 2,3-O-(3-pentylidene)-D-glyceraldehyde (2) and 2,3-O-(3-pentylidene)-L.-glyceraldehyde (3) is presented. Synthesis, handling and storage advantages of 2 and 3 over the conventionally employed 2,3-O-isopropylidene-D-glyceraldehyde (1) are discussed. The 3-pentanone-derived protecting group facilitates the extraction of product from aqueous oxidation solutions, while the 3-pentanone liberated on ketal deprotection can be efficiently removed at reduced pressures. The synthesis employs a buffered potassium periodate oxidation which offers significant advantages over sodium periodate in glycol cleavage reactions.
报道了两种新型
甘油醛替代物,2,3-O-(3-戊叉)-D-
甘油醛(2)和2,3-O-(3-戊叉)-L-
甘油醛(3)的合成。与传统使用的2,3-O-异亚丙基-D-
甘油醛(1)相比,讨论了2和3在合成、处理和储存方面的优点。由
3-戊酮衍生的保护基团有助于从
水相氧化溶液中提取产物,而在
缩酮去保护时释放的
3-戊酮可以在减压下有效去除。该合成采用缓冲的
高碘酸钾氧化,相较于
高碘酸钠在二醇裂解反应中具有显著优势。