Nuclear spin-spin coupling via nonbonded interactions. 3. Importance of bridgehead interactions on vicinal carbon-13-proton and carbon-13-carbon-13 coupling constants in bicycloalkanes
1-Norbornyllithium as a Precursor for the Synthesis of Novel Organic 1-Bicyclo[2.2.1]Heptane Derivatives and for the Improved Preparation of 1-Chloro-Bicyclo[2.2.2]octane
作者:Kalina Kostova、Vladimir Dimitrov
DOI:10.1080/00397919508011771
日期:1995.5
Abstract An improved strategy for synthesis of 1-chloro-bicyclo[2.2.2]octane is described in which the key compounds 1-norborny substituted ethyl formate(3) or 1-norbornylcarbaldehyde (7) were prepared from 1-norbornyllithium(1). The latter appeared as a useful precursor for the synthesis of various organic bridgehead substituted derivatives.
Solvent-Equilibrated Ion Pairs from Carbene Fragmentation Reactions
作者:Robert A. Moss、Fengmei Zheng、Jean-Marie Fedé,、Lauren A. Johnson、Ronald R. Sauers
DOI:10.1021/ja040146o
日期:2004.10.1
[R(+) OC Cl(-)] ionpairs were generated in methanol/dichloroethane solutions, with R(+) as the 1-bicyclo[2.2.2]octyl, 1-adamantyl, or 3-homoadamantyl cation. Ionpairs were produced either by the direct fragmentation of alkoxychlorocarbenes (ROCCl), with R = 1-bicyclo[2.2.2]octyl, 1-adamantyl, or 3-homoadamantyl, or by the ring expansion-fragmentation of R'CH(2)OCCl, with R' = 1-norbornyl, 3-noradamantyl
Fragmentation of alkoxychlorocarbenes in the gas phase
作者:Michael E Blake、Maitland Jones、Fengmei Zheng、Robert A Moss
DOI:10.1016/s0040-4039(02)00438-0
日期:2002.4
In contrast to photolysis or thermaldecomposition in solution, which is dominated by ionic reactions, flash vacuum pyrolysis of alkylchlorodiazirines in the gas phase generates radicals. The cyclopropylcarbinyl system is re-examined and the 1-norbornylcarbinyl system is studied for the first time.
ALKALOID AMINOESTER DERIVATIVES AND MEDICINAL COMPOSITION THEREOF
申请人:Caligiuri Antonio
公开号:US20100173880A1
公开(公告)日:2010-07-08
Alkaloid aminoester compounds which act as muscarinic receptor antagonists are useful for the prevention and/or treatment of a broncho-obstructive or inflammatory diseases.