作者:Yves Génisson、Peter C. Tyler、R. G. Ball、Robert N. Young
DOI:10.1021/ja0112341
日期:2001.11.1
The stereospecific total synthesis of (±)-thielocin A1β has been achieved from the common intermediate ethyl 5-formyl-2,4-dihydroxy-3,6-dimethyl benzoate (8). The racemic synthesis was achieved based on the key reaction of a 4-methyl-3,4-dihydroxy cyclohexadienone 38 with a quinone methide derived at low temperature from the fluoride ion catalyzed composition of piperidinium salt 40. The resulting
(±)-thielocin A1β 的立体定向全合成已从常见的中间体 5-甲酰基-2,4-二羟基-3,6-二甲基苯甲酸乙酯 (8) 中实现。外消旋合成是基于 4-甲基-3,4-二羟基环己二烯酮 38 与从氟离子催化的哌啶盐 40 组合物低温衍生的醌甲基化物的关键反应而实现的。所得缩合物 (31) 被同系化通过与受保护的单体苯酚 41 连续酯化,在小心去除保护基团后,提供所需的硫菌素 A1β。