Organocatalytic Access to Enantioenriched Dihydropyran Phosphonates via an Inverse-Electron-Demand Hetero-Diels–Alder Reaction
作者:Christian F. Weise、Vibeke H. Lauridsen、Raoní S. Rambo、Eva H. Iversen、Marie-Luise Olsen、Karl Anker Jørgensen
DOI:10.1021/jo500347a
日期:2014.4.18
hetero-Diels–Alder reaction of the remote olefin functionality in dienamines has been developed by the simultaneous activation of α,β-unsaturated aldehydes and acyl phosphonates. The dual activation is based on an organocatalyst that activates both the α,β-unsaturated aldehyde, through dienamine formation, and the acyl phosphonate by hydrogen-bonding. The enantioselective reaction results in the formation
Concise synthesis of valuable chiral N -Boc- β -benzyl- β -amino acid via construction of chiral N -Boc-3-benzyl-5-oxoisoxazolidine through cross-metathesis/conjugate addition/oxidation
作者:Hong-Tao Jiang、Hao-Ling Gao、Cheng-Sheng Ge
DOI:10.1016/j.cclet.2016.10.005
日期:2017.2
Abstract Valuable chiral N-Boc-β-benzyl-β-amino acid was concisely synthesized via construction of chiral N-Boc-3-benzyl-5-oxoisoxazolidine through cross-metathesis/conjugateaddition/oxidation. All of the starting materials for the synthesis of chiral N-Boc-β-benzyl-β-amino acid are cheap, and two-step short procedure make it easy for the rapid construction of various chiral β-arylmethyl-β-amino acids
Dienamine-Mediated Inverse-Electron-Demand Hetero-Diels-Alder Reaction by Using an Enantioselective H-Bond-Directing Strategy
作者:Łukasz Albrecht、Gustav Dickmeiss、Christian F. Weise、Carles Rodríguez-Escrich、Karl Anker Jørgensen
DOI:10.1002/anie.201207122
日期:2012.12.21
Giving directions: optically active dihydropyrans bearing three contiguous stereogenic centers can be efficiently prepared by the title reaction. High stereo- and regiocontrol can be achieved by employing a bifunctional H-bond-directing aminocatalyst.
INHIBITORS OF THE BINDING OF CHEMOKINES I-TAC OR SDF-1 TO THE CCXCKR2 RECEPTOR