A Baylis–Hillman/ozonolysis route towards (±) 4,5-dihydroxy-2,3-pentanedione (DPD) and analogues
作者:Marine Frezza、Laurent Soulère、Yves Queneau、Alain Doutheau
DOI:10.1016/j.tetlet.2005.07.102
日期:2005.9
anal and 3-buten-2-one followed by desilylation gave rise to the corresponding α-methylene-β,γ-dihydroxy ketone further converted by reductive ozonolysis of the carbon–carbon double bond into racemic 4,5-dihydroxy-2,3-pentanedione (DPD), a significant molecule in bacterial cell–cell communication systems. The same sequence applied to other substrates allowed the preparation of chain elongated analogues
2-(叔丁基二甲基甲硅烷氧基)乙醛与3-丁烯-2-酮之间的Baylis-Hillman反应,然后进行去甲硅烷基化反应,生成相应的α-亚甲基-β,γ-二羟基酮,通过碳-碳的还原性臭氧分解进一步转化双键形成外消旋的4,5-二羟基-2,3-戊二酮(DPD),这是细菌细胞间通讯系统中的重要分子。应用于其他底物的相同序列允许制备DPD的链延长类似物和5- O-酰化衍生物。