- Ortho-substitution groups promoted photo-induced E (trans) → Z (cis) isomerization
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The past decades have witnessed the fast growth of ortho-directing group assisted in C[sbnd]H activation and olefination. Herein we addressed these olefination products’ photo-induced E → Z isomerization in term of various ortho-substitution groups. Initi
- Cui, He-Zhen,Hong, Xi,Hou, Xiu-Feng,Reheman, Aikebaier,Sun, Yong,Zhan, Bing,Zhou, Quan
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supporting information
(2020/09/21)
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- Preparation of chiral phosphorus, sulfur and selenium containing 2-aryloxazolines
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A series of enantiomerically pure 2-[2-(diarylphosphino)aryl]-oxazolines was prepared from commercially available or synthetic amino alcohols. For oxazoline formation three procedures were employed: (i) one pot condensation with a 2-halobenzoic acid (ii) ZnCl2 catalyzed condensation with a 2-halobenzonitrile, and (iii) a three step sequence via a 2-halobenzamide and a tosylate or chloride. Phosphinooxazolines containing stereogenic phosphorous were prepared by either diastereoselective nucleophilic substitution of halogenide of Ar1Ar2PCl or by nucleophilic aromatic substitution with LiPAr1Ar2. In addition, sulfur and selenium analogs were prepared.
- Peer, Markus,De Jong, Johannes C.,Kiefer, Matthias,Langer, Thomas,Rieck, Heiko,Schell, Heico,Sennhenn, Peter,Sprinz, Juergen,Steinhagen, Henning,Wiese, Burkhard,Helmchen, Guenter
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p. 7547 - 7583
(2007/10/03)
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- Synthesis of Chiral Dibenzo-1,8-diaza-14-crown-4, Dibenzo-1,9-diaza-16-crown-4, and Dibenzo-1,10-diaza-18-crown-4 Ethers by Aromatic Nucleophilic Substitution. Application to the Preparation of Bicyclic Chiral Crown-LiI Complexes
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New methods for the preparation od dibenzo-1,8-diaza-14-crown-4, dibenzo-1,9-diaza-16-crown-4, and dibenzo-1,10-diaza-18-crown-4 ethers 2, 4, 5, 14, 15 and 16 are described.Bimolecular cyclization of ortho-substituted benzamides (derived from 1,2-, 1,3-,
- Schultz, Arthur G.,Pinto, Donald J. P.,Welch, Martha
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p. 1372 - 1380
(2007/10/02)
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