Small-Ring Compounds. XXXIV. Carbonium Ion Reactions of 1-Methylcyclobutyl, (1-Methylcyclopropyl)-carbinyl and (β-Methylallyl)-carbinyl Derivatives<sup>1</sup>
作者:Eugene F. Cox、Marjorie C. Caserio、Marc S. Silver、John D. Roberts
DOI:10.1021/ja01473a028
日期:1961.6
alcohol as the only cyclic product. About 3% of the ^(14)C content of 1-methylcyclobutanol from the deamination of (1-methylcyclopropyl)-carbynil-α-^(14)C)-amine was found at the 3-position. These results are interpretable in terms of classical carboniumions and/or substituted “bicyclobutonium” ion intermediates with fairly localized positive charges.
A vinylcyclobutane substrate designed as a cyclopropylcarbinyl radical probe
作者:Phyllis A. Leber、Ryan M. Bell、Carlton W. Christie、Joseph A. Mohrbacher III
DOI:10.1039/c3ob00033h
日期:——
Appending a spirocyclopropane linkage to bicyclo[3.2.0]hept-2-ene is achieved by selective kinetic cyclopropanation of 6-methylenebicyclo[3.2.0]hept-2-ene. The resultant vinylcyclobutane undergoes [1,3] migration as the dominant thermal process. A minor cyclopropylcarbinyl (CPC) rearrangement product clearly implicates a diradical transition structure. The presence and absence of other potential thermal
The present invention relates to a process for the preparation of compounds endowed with phosphodiesterase (PDE4) inhibitory activity having formula (I). The invention also relates to the process for the isolation by crystallization of the compound (I) and to its use for the preparation of pharmaceutical compositions for inhalation in combination with suitable carriers or vehicles. The present invention also relates to solvates and crystal forms of a compound of formula (I). The synthesized product is suitable for use in pharmaceutical applications for instance in the treatment of respiratory diseases.
Tricyclic pyrone derivatives as protease inhibitors and antiviral agents
申请人:Warner-Lambert Company
公开号:US05504104A1
公开(公告)日:1996-04-02
The present invention relates to novel substituted tricyclic pyrones and related structures which potently inhibit the HIV aspartyl protease blocking HIV infectivity. The tricyclic pyrone derivatives are useful in the development of therapies for the treatment of vital infections and diseases, including AIDS. The present invention is also directed to methods of synthesis of multifunctionalized tricyclic pyrones and of related structures.
Pyrrolotriazinone compounds and their use to teat diseases
申请人:——
公开号:US20030232832A1
公开(公告)日:2003-12-18
The present invention provides compounds of formula I
1
and pharmaceutically acceptable salts thereof useful for inducing mitotic arrest thereby making them useful as anti-cancer agents and other diseases which can be treated by inducing mitotic arrest.