902458-04-2Relevant articles and documents
Dual Activation of Unsaturated Amides with Schwartz's Reagent: A Diastereoselective Access to Cyclopentanols and N,O-Dimethylcyclopentylhydroxylamines.
Coelho, Aurélien,Souvenir Zafindrajaona, Mahasoa-Salina,Vallée, Alexis,Behr, Jean-Bernard,Vasse, Jean-Luc
supporting information, (2021/12/06)
The diastereoselective access to cyclopentanols and N,O-dimethylcyclopentylhydroxylamines from 4-pentenoic acid-derived Weinreb amides is described. Based on the concomitant generation of both the nucleophilic and the electrophilic poles by hydrozirconati
Chemodivergence in enantioselective desymmetrization of diazabicycles: Ring-opening versus reductive arylation
Menard, Frederic,Lautens, Mark
, p. 2085 - 2088 (2008/12/23)
(Chemical Equation Presented) Divergent bicycle paths: A chemodivergent desymmetrization occurs after an initial enantioselective carbometalation step. The reaction brings a solution to the challenging problem of the enantioselective ring-opening of diazabicyclo-[2.2.1]heptanes to obtain arylated cyclopentenamines (see scheme, right). An alternative reaction pathway was discovered in which C-H insertion/1,4-metal migration occurs to give reductive arylation products (left).
Kinetic resolution of (±)-trans- and (±)-cis-2- phenylcyclopentanamine by CALB-catalyzed aminolysis of esters: The key role of the leaving group
Gonzalez-Sabin, Javier,Gotor, Vicente,Rebolledo, Francisca
, p. 481 - 488 (2007/10/03)
Kinetic resolution of (±)-trans- and (±)-cis-2- phenylcyclopentanamine is effectively performed by lipase B from Candida antarctica, (CALB)-catalyzed aminolysis reaction. Whereas reaction between (±)-trans-2-phenylcyclopentanamine and ethyl acetate proceeds with a very high E value (>200) and conversion (50%), the corresponding acetylation of (±)-cis-2-phenylcyclopentanamine happens with low E value (16) and conversion (28%). Nevertheless, this problem is overcome using other acyl donors such as (±)-1-phenylethyl and (±)-cis-2-phenylcyclopentyl methoxyacetates. The influence of the acyl donor on the CALB-catalyzed aminolysis of (±)-cis-2-phenylcyclopentanamine is also studied.