Syntheses of (5E)-PGE2 and New 6-Functionalized Derivatives by the Use of Palladium-Catalyzed Decarboxylative Allylic Alkylation
作者:Toshio Tanaka、Noriaki Okamura、Kiyoshi Bannai、Atsuo Hazato、Satoshi Sugiura、Koji Tomimori、Kenji Manabe、Seizi Kurozumi
DOI:10.1016/s0040-4020(01)82115-3
日期:1986.1
followed by intramolecular palladium-catalyzed decarboxylative allylic alkylation. The (5)-prostaglandin E2 skeleton was also obtained from the β-keto allylic ester (11) by a similar decarboxylative allylic alkylation. The decarboxylative allylic alkylation of another type of the three-component coupling product (12) gave new 6-methyleneprostaglandin E1 skeleton (15a), which was converted into new 6-methylprosta-glandin
(5 )-前列腺素E 2(7)由有机铜共轭加成加合物(3)的2-烯氧基氧羰基(1)由()-4-丁基二甲基甲硅烷氧基-2-环戊烯酮(1)合成,然后通过分子内钯催化的脱羧烯丙基烷基化反应合成。(5 )-前列腺素E 2骨架也由β-酮烯丙基酯(11)通过类似的脱羧烯丙基烷基化获得。另一种类型的三组分偶联产物(12)的脱羧烯丙基烷基化反应产生了新的6-亚甲基前列腺素E1骨架(15a),将其转化成新的6 methylprosta-glandin我甲酯(20)6-methyleneprostaglandin˚F 1 α衍生物(16由两种不同的方式)。该分子内脱羧烯丙基烷基化的立体化学在2-[()-或()-2-丁烯氧基-羰基]环戊酮体系的反应中进行了讨论。