Synthesis of bodinieric acids A and B, both C-18 and C-19-functionalized abietane diterpenoids: DFT study of the key aldol reaction
作者:Ramón J. Zaragozá、Miguel A. González-Cardenete
DOI:10.1039/d0ra02711a
日期:——
The first synthesis of C-18- and C-19-bifunctionalized abietane diterpenoids, bodinieric (or callicapoic) acids, via an aldol reaction has been developed. This key aldol reaction was very sensitive to steric hindrance. This fact has been studied by deuterium exchange experiments and DFT methods. Optimization of this reaction led to the synthesis of anti-inflammatory bodinieric acids A and B, starting
首次通过羟醛反应合成 C-18-和 C-19-双功能化松香烷二萜类化合物 bodinieric(或 callicapoic)酸。这个关键的羟醛反应对空间位阻非常敏感。这一事实已通过氘交换实验和DFT方法进行了研究。对该反应的优化导致以松香酸为原料合成抗炎的 bodinieric 酸 A 和 B。
Photochemische Reaktionen 100. Mitteilung. Photochemistry of N-Acylimidazoles. V. Photolysis of the N-Acylimidazoles of Dehydroabietic Acid and of 13-Deisopropyl-10-epi-dehydroabietic Acid
作者:Shigeo Iwasaki
DOI:10.1002/hlca.19780610811
日期:1978.12.13
The irradiation of 1-(dehydroabietoyl) imidazole (3) gave no Type II elimination product but yielded instead compounds 6 and 7 by migration of the imidazolylcarbonyl group from C(4′) to C(6′) of the abietan moiety, probably via a cyclobutanol intermediate. Similarly, irradiation of 1-(13′-deisopropyl-10′-epi-dehydro-abietoyl)imidazole (13) gave only a small amount of Type II fragmentation product 20
Electrooxidative Functionalizations of Dehydroabietic Acid
作者:Kenji Uneyama、Tatsuo Katayama、Sigeru Torii
DOI:10.1246/bcsj.60.3043
日期:1987.8
Dehydroabietic acid methyl ester (1) was converted into 7-acetoxydehydroabietic acid methyl ester by direct electrooxidation in acetic acid and 7-oxodehydroabietic acid methyl ester by ruthenium dioxide-mediated oxidation. Non-Kolbe type electrodecarboxylation of 1 resulted in the introduction of a double bond into the ring A of 1.
Scalable Electrochemical Decarboxylative Olefination Driven by Alternating Polarity**
作者:Alberto F. Garrido‐Castro、Yuta Hioki、Yoshifumi Kusumoto、Kyohei Hayashi、Jeremy Griffin、Kaid C. Harper、Yu Kawamata、Phil S. Baran
DOI:10.1002/anie.202309157
日期:2023.10.16
The electrochemical conversion of unactivated carboxylic acids to olefins under alternating polarity is reported. By modulating electrode surface quality and local acidity, chemoselective Hofer-Moest reactivity is realized on conventionally difficult substrates, including primary and secondary unactivated carboxylic acids. This simple protocol is exceptionally scalable (1 kg) and cost-effective.