Total Synthesis and Determination of the Absolute Configuration of Epibatidine
摘要:
The synthesis of (+)- and (-)-epibatidine (exo-2-(2-chloropyridin-5-yl)-7-azabicyclo [2.2.1]heptane) via reaction of 5-lithio-2-chloropyridine with (+)- and (-)-N-BOC-7-azabicyclo[2.2.1]heptan-2-one is described. The absolute configuration of the natural product is shown to be 1R,2R,4S.
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.
[EN] ENANTIOMERICALLY PURE AMINES<br/>[FR] AMINES ÉNANTIOMÉRIQUEMENT PURES
申请人:NABRIVA THERAPEUTICS AG
公开号:WO2011146953A1
公开(公告)日:2011-12-01
A compound of formula I wherein PROT is an amine protecting group and PROT' is hydrogen; or PROT and PROT' together with the nitrogen atom to which they are attached form a heterocyclic ring as an amine protecting group, and PROT" is a thiol protecting group, processes for its production, intermediates in their production and production of intermediates in stereoisomerically pure form, and their use for the production of pharmaceutically active compounds.
作者:Stephen R. Fletcher、Raymond Baker、Mark S. Chambers、Sarah C. Hobbs、Paul J. Mitchell
DOI:10.1039/c39930001216
日期:——
The synthesis of the alkaloid epibatidine exo-2-(2-chloro-5-pyridyl)-7-azabicyclo[2.2.1]heptane} in enantiomeric form involving, as the critical step, reaction or 5-lithio-2-chloropyridine with N-tert-butoxycarbonyl-7-azabicyclo[2.2.1]heptan-2-one is described.
[EN] PROCESS FOR THE PREPARATION OF PLEUROMUTILINS<br/>[FR] PROCÉDÉ POUR LA PRÉPARATION DE PLEUROMUTILINES
申请人:NABRIVA THERAPEUTICS AG
公开号:WO2011146954A1
公开(公告)日:2011-12-01
Process for the preparation of a Compound of formula I in the form of a single stereoisomer in crystalline form, comprising deprotecting the amine group in a Compound of formula IIa or in a mixture of a compound of formula IIa With a compound of formula IIb and isolating a Compound of formula I from the reaction mixture; Compounds and salts of Compounds of formula I in crystalline form; pharmaceutical compositions comprising such salts; processes for the preparation of intermediates and intermediates in a process for the preparation of a Compound of formula I.
A compound of formula
wherein PROT, PROT' and R have various meanings, processes for its production and production of intermediates in stereoisomerically pure form, and its use for the production of pharmaceutically active compounds.