Complexation diastereoselective d'alcools benzyliques par le chrome hexacarbonyle. Difference de reactivite des diastereoisomeres en milieu acide. |
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| Authors: | Jacques Brocard Jacques Lebibi Lydie Pelinski Madani Mahmoudi |
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| Institution: | Laboratoire de Synthèse Organique, Université des Sciences et Techniques de Lille - Flandres - Artois, 59655 Villeneuve D'Ascq Cedex, France. |
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| Abstract: | Reaction of ortho alkyl or alkoxy phenyl carbinol with Cr(CO)6 affords arene chromium tricarbonyl complexes with 38 to 86% of diastereoisomeric excess. The behavior of the two diastereoisomers shows a striking difference. Equimolar mixture of (RR,SS) and (RS,SR) diastereoisomers treated with concentrated sulfuric acid and methanol gives (RS,SR) ether while (RR,SS) alcool remains unchanged. |
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