Reaction of adamantane series olefins with N-bromosuccinimide
摘要:
Features of allyl bromination of sterically hindered adamantane series olefins with N-bromosuccinimide were investigated. A series of unsaturated mono- and polybromo adamantane derivatives was synthesized. The configuration of compounds obtained was established using 2D NOESY NMR spectroscopy.
Evidence that the availability of an allylic hydrogen governs the regioselectivity of the Wacker oxidation
作者:Matthew J. Gaunt、Jinquan Yu、Jonathan B. Spencer
DOI:10.1039/b103066n
日期:——
The allylic hydrogen is found to have a dramatic effect on the
regioselectivity of the Wacker oxidation, leading to the postulation that
an agostic hydrogen or enyl (σ + π) complex helps to stabilise the
key intermediate.
1,2-Asymmetric induction in reactions of nonconjugated acyclic radicals: a new model for highly selective atom-transfer reactions of alkyl-substituted radicals
作者:Gebhard Thoma、Dennis P. Curran、Steven V. Geib、Bernd Giese、Wolfgang Damm、Frank Wetterich
DOI:10.1021/ja00072a010
日期:1993.9
selective product formation due to 1,2-asymmetricinduction. The level of diasterselectivity depends on the size of the alkyl substituent on the radical. Tertiary alkyl groups give high syn selectivity, secondary groups lead to a moderate syn selectivity, and primary groups show completely unselective reactions. To explain the stereochemical outcome, a new steric model of the 1 Bu-substituted radical
据报道,甲基碘代丙二腈 (1) 通过碘转移加成到几种二烷基取代的烯烃上。由于 1,2-不对称诱导,碘转移反应到无环非共轭自由基中间体通常会导致选择性产物形成。非对映选择性的水平取决于基团上烷基取代基的大小。叔烷基产生高顺式选择性,仲基产生中等顺式选择性,伯基显示完全非选择性反应。为了解释立体化学结果,基于 AM1 计算和 EPR 数据引入了 1 Bu 取代基 5e 的新空间模型
Synthesis and Reactions of Functionally Substituted
2-(Adamantan-1-yl)oxiranes
作者:M. V. Leonova、L. P. Permyakova、M. R. Baimuratov、Yu. N. Klimochkin
DOI:10.1134/s1070428020040119
日期:2020.4
AbstractFunctionally substitutedoxiranes were synthesized by epoxidation of unsaturated compounds of the adamantane series with m-chloroperoxybenzoic acid. Adamantyl-substituted epibromohydrins reacted with nitrogen, oxygen, and sulfur nucleophiles to give only halogen substitution products. 2-(Adamantan-1-yl)-3-hydroxypropanoic acid was obtained by the reaction of 2-(adamantan-1-yl)-2-(bromomethyl)oxirane with 98%
Synthesis of γ-sultones based on conversion of adamantane-type olefins
作者:Marat R. Baimuratov、Marina V. Leonova、Victor B. Rybakov、Yuri N. Klimochkin
DOI:10.1007/s10593-015-1740-3
日期:2015.6
γ-Sultones condensed with the homoadamantane polycycle were synthesized by sulfonation of 1-(adamant-1-yl)-substituted olefins. The formation of γ-sultones containing a substituent at the α-position to the sulfonyl group occurs stereospecifically: 1Н and 13С NMR data support the formation of only the threo diastereomer.
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