Journal
TETRAHEDRON-ASYMMETRY
Volume 13, Issue 20, Pages 2187-2191Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0957-4166(02)00588-8
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A novel C-2-symmetric chiral arsine was synthesized from (S)-(-)- 1, 1'-bi-2-naphthol in three steps. It was employed in the enantioselective olefination of 4-substituted cyclohexanones via a stabilized ylide formed in situ from the corresponding arsonium salt. Enantioselectivity up to 40% was obtained. Moreover, a reversal in the stereochemistry of the product was observed simply by changing the counter cation of the base from lithium to potassium. (C) 2002 Elsevier Science Ltd. All rights reserved.
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