作者:Hisato Nonaka、Narihito Ogawa、Noriaki Maeda、Yong-Gang Wang、Yuichi Kobayashi
DOI:10.1039/c0ob00218f
日期:——
epi-Jasmonic acid (epi-JA) and tuberonic acid (TA) were synthesized from the key aldehyde, all cis-2-(2-hydroxy-5-vinylcyclopentyl)acetaldehyde (14), which was in turn prepared stereoselectively from the (1R)-acetate of 4-cyclopentene-1,3-diol (10) through SN2-type allylic substitution with CH2CHMgBr followed by Mitsunobu inversion, Eschenmoser–Claisen rearrangement, and regioselective Swern oxidation
表-茉莉酸 (Epi -JA) 和 胡椒酸 (TA)是由关键醛合成的,所有 顺-2-(2-羟基-5-乙烯基环戊基)乙醛(14),其又由(1R)-乙酸的乙酸酯立体选择性地制备。4-环戊烯-1,3-二醇(10)通过用CH 2 CHMgBr进行S N 2型烯丙基取代,然后进行Mitsunobu转化,埃申摩瑟–相应的bis-TES醚(13)的克莱森重排和区域选择性Swern氧化。醛14与[Ph 3 P(CH 2)Me] +的维蒂希反应溴−随后进行氧化Epi -JA(3)对反式异构体的立体选择性。相似地,TA(5)被合成。此外,上述发现已成功地用于提高以前合成的12-氧代PDA(1)。