Preparation and biological activity of 13-substituted retinoic acids
摘要:
13-Demethyl or 13-substituted all-E- and 9Z-retinoic acids were synthesized using a palladium-catalyzed coupling reaction of enol triflates and tributylstannylolefins. Their biological activities were then measured. The 13-ethyl analogs exhibited approximately one-half of the antiproliferative and differentiation-inducing activity of ATRA in HL-60 cells. In contrast, in the 9Z-derivatives, all analogs, except for the 13-butyl derivatives, showed apoptosis-inducing activity. (C) 2004 Elsevier Ltd. All rights reserved.
Synthesis of 9Z-9-Substituted Retinoic Acids by Palladium Catalyzed Coupling Reaction of a Vinyl Triflate with Alkenyl Stannanes.
作者:Akimori WADA、Yuki NOMOTO、Kenji TANO、Eriko YAMASHITA、Masayoshi ITO
DOI:10.1248/cpb.48.1391
日期:——
Palladium catalyzed cross coupling reactions of a vinyl triflate intermediate and various alkenyl stananes afforded trisubstituted Z-olefins stereoselectively in high yields. These olefins were then converted to the corresponding 9Z-retinoic acids via Horner-Emmons reaction and subsequent basic hydrolysis in excellent yields.
Palladium-Catalyzed Coupling Reaction of an Enol Nonaflate with (Vinyl)tributylstannanes and Acetylenes: A Highly Stereoselective Synthesis of 8,18-<sup>13</sup>C<sub>2</sub>-Labeled Retinal
作者:Akimori Wada、Yasuhiro Ieki、Saeko Nakamura、Masayoshi Ito
DOI:10.1055/s-2005-865294
日期:——
Here we report that enol nonaflates exhibit higher reactivity than the corresponding enol triflates in palladium-catalyzed cross-coupling reactions with various (vinyl)tributylstannanes and acetylenes. We also highlight the reaction of a vinyl nonaflate, containing two 1 3 C-labeled carbon atoms with an alkenyl stannane, which afforded the trisubstituted E-olefin stereoselectively in high yield. The
在这里,我们报告烯醇九氟甲磺酸酯在钯催化的与各种(乙烯基)三丁基锡烷和乙炔的交叉偶联反应中表现出比相应的烯醇三氟甲磺酸酯更高的反应性。我们还强调了含有两个 1 3 C 标记的碳原子的乙烯基九烷基锡与烯基锡烷的反应,它以高产率立体选择性地提供了三取代的 E-烯烃。然后将 E-烯烃转化为相应的全 E-视黄醛。
Palladium Catalyzed Coupling Reaction of an Enol Nonaflate with (Vinyl)tributylstannanes and Acetylenes
作者:Akimori Wada、Yasuhiro Ieki、Masayoshi Ito
DOI:10.1055/s-2002-32602
日期:——
stereoselective synthesis of trienes and dienynes was developed by palladium catalyzed cross couplingreactions of an enol nonaflate with (vinyl)tributylstannanes and acetylenes in good to excellent yields. Here, the enol nonaflate exhibited a higher reactivity compared with the corresponding enol triflate in the couplingreactions.
Caesium fluoride-promoted Stille coupling reaction: an efficient synthesis of 9Z-retinoic acid and its analogues using a practical building block
作者:Takashi Okitsu、Kinya Iwatsuka、Akimori Wada
DOI:10.1039/b813760a
日期:——
A highly efficient and rapid total synthesis of 9Z-retinoic acid was accomplished by caesium fluoride-promoted Stille coupling reaction; using a common building block, 9Z-retinoic acid analogues were also prepared by the same method without isomerisation of the Z-double bond.
13-Demethyl or 13-substituted all-E- and 9Z-retinoic acids were synthesized using a palladium-catalyzed coupling reaction of enol triflates and tributylstannylolefins. Their biological activities were then measured. The 13-ethyl analogs exhibited approximately one-half of the antiproliferative and differentiation-inducing activity of ATRA in HL-60 cells. In contrast, in the 9Z-derivatives, all analogs, except for the 13-butyl derivatives, showed apoptosis-inducing activity. (C) 2004 Elsevier Ltd. All rights reserved.