Scope of the directed dihydroxylation: application to cyclic homoallylic alcohols and trihaloacetamides
作者:Timothy J. Donohoe、Lee Mitchell、Michael J. Waring、Madeleine Helliwell、Andrew Bell、Nicholas J. Newcombe
DOI:10.1039/b303081d
日期:——
The synthesis and directed dihydroxylation of a range of cyclic alkenes was investigated. Both homoallylic alcohols and homoallylic trihaloacetamides were found to be efficient directing groups, giving rise to good to excellent levels of remote asymmetric induction with OsO4–TMEDA. Interestingly, in all cases examined, trifluoroacetamides were found to be superior to trichloroacetamides as directing groups and an argument is presented which rationalises this observation.
Process for hydrocarbonylations in supercritical carbon dioxide
申请人:The Research Foundation of State University of New York
公开号:US05962744A1
公开(公告)日:1999-10-05
A process comprising subjecting at least one compound containing at least one carbon--carbon double bond or at least one carbon--carbon triple bond, hydrogen and carbon monoxide, to a hydrocarbonylation reaction in supercritical carbon dioxide, in the presence of a Group VIII transition metal catalyst precursor, and a phosphite ligand.
Trisubstituierte 1,2,3-Triazole der Formel
worin R einen aliphatischen Rest bedeutet, R₁ Amino, Carbamoyl, C₁-C₇-Alkylcarbamoyl, Di-C₁-C₇-alkyl-carbamoyl oder C₁-C₇-Alkyl bedeutet und R₂ Carbamoyl, C₁-C₇-Alkylcarbamoyl oder Di-C₁-C₇-alkylcarbamoyl bedeutet, können als Arzneimittelwirkstoffe verwendet werden und werden in an sich bekannter Weise hergestellt.
式中 R 表示脂肪基,R₁表示氨基、氨基甲酰基、C₁-C₇-烷基氨基甲酰基、二-C₁-C₇-烷基氨基甲酰基或 C₁-C₇-烷基,R₂表示氨基甲酰基的三取代 1,2,3-三唑、 C₁-C₇-烷基氨基甲酰基或二-C₁-C₇-烷基氨基甲酰基可用作活性药物成分,其生产方式本身已知。
Hydroformylation of Homoallylic Azides: A Rapid Approach toward Alkaloids
作者:Thomas Spangenberg、Bernhard Breit、André Mann
DOI:10.1021/ol802314g
日期:2009.1.15
Unprecedented hydroformylation of homoallylic azides combined with useful one-pot operations provides an expeditive access to alkaloids.
Short Access to (+)-Lupinine and (+)-Epiquinamide via Double Hydroformylation
作者:Etienne Airiau、Thomas Spangenberg、Nicolas Girard、Bernhard Breit、André Mann
DOI:10.1021/ol902718q
日期:2010.2.5
Short and efficient access to (+)-lupinine and (+)-epiquinamide by means of an unprecedented double hydroformylation of a bis-homoallylic azide followed by a tandem catalytic hydrogenation/reductive bis-amination is reported.