Transformations of cage alcohols in the presence of 2-propanol and H2SO4
作者:Elena A. Ivleva、Marat R. Baimuratov、Milena S. Shishkina、Yulia E. Khatmullina、Marina V. Leonova、Yuri N. Klimochkin
DOI:10.1016/j.tet.2024.133842
日期:2024.2
A convenient approach for the synthesis of hydrocarbons by transformations of cage alcohols in the presence of 2-propanol and sulfuric acid has been proposed. Scalability, good yields and usage of readily available reagents along with synthetic convenience showed usefulness of proposed approach. This approach made it possible to obtain high preparative yields of difficult-to-reach cage hydrocarbons
Masters, Andrew P.; Sorensen, Ted S.; Tran, Phu Mahn, Canadian Journal of Chemistry, 1987, vol. 65, p. 1499 - 1502
作者:Masters, Andrew P.、Sorensen, Ted S.、Tran, Phu Mahn
DOI:——
日期:——
Synthesis and free radical scavenging activity of some new spiropyranocoumarins
作者:Vassiliki Panteleon、Ioannis K. Kostakis、Panagiotis Marakos、Nicole Pouli、Ioanna Andreadou
DOI:10.1016/j.bmcl.2008.09.065
日期:2008.11
A series of novel spiro-substituted 4-hydroxypyranocoumarins and their corresponding dihydropyrano cis-diols has been synthesized. Among them the spiroadamantylpyranocoumarin and the diols can interact with the stable free radical 1,1-diphenyl-2-picrylhydrazyl and scavenge superoxide anions generated in the xanthine-xanthine oxidase system. (C) 2008 Elsevier Ltd. All rights reserved.
Preparation and carbon 13 NMR spectroscopic study of the 2-(adamantylidenemethyl)-2-adamantyl and 2-adamantylidene-1,1-dicyclopropylethyl cations
作者:George A. Olah、V. Prakash Reddy、Joseph Casanova、G. K. Surya Prakash
DOI:10.1021/jo00050a014
日期:1992.11
2-(Adamantylidenemethyl)-2-adamantyl cation (5) was prepared by ionization of 2-(adamantylidenemethyl)-2-adamantanol (9) in FSO3H/SO2ClF or neat FSO3H at -78-degrees-C. In spite of its high inherent steric strain, carbocation 5 is stable up to 80-degrees-C. Its rotational barrier was estimated to be 16.8 kcal/mol on the basis of the coalescence temperature of the C-13 NMR signals of its diastereomeric beta-methylene carbons, which is in agreement with a DELTAH(double dagger) value of 16.5 kcal/mol calculated by MNDO. Similarly, 2-adamantylidene-l,l-dicyclopropylethyl cation (6) was prepared by the ionization of 1,1-dicyclopropyl-2-(2-hydroxy-2-adamantyl)ethanol (12) in SbF5-FSO/SO2ClF or FSO3H/SO2ClF. Carbocation 6 shows a rotational barrier of less than 5 kcal/mol. The small rotational barrier in 6 is interpreted as due to the positive charge stabilizing influence of the adjacent cyclopropyl groups resulting in an unsymmetrically charge-delocalized allylic cation.
Compositions and methods for the treatment of neurodegenerative diseases
申请人:Staunton Jane
公开号:US20060270742A1
公开(公告)日:2006-11-30
The invention features compositions and methods for the treatment of neurodegenerative diseases.