... Tetrahedron Letters. Volume 35, Issue 16, 18 April 1994, Pages 2533–2536. Cover image Cover image. Asymmetric synthesis. XXXI. ... Tetrahedron Lett., 34 (1993), pp. 4373–4376. c) S. Gubert, C. Braojos, L. Anglada, J. Bolos, A. Sacristan, JA Ortiz; ...