Brp. Stone et al., SYNTHESIS OF UNSYMMETRIC CYCLIC UREA DIOLS, A NOVEL CLASS OF HIV PROTEASE INHIBITORS, Tetrahedron letters, 39(34), 1998, pp. 6127-6130
Unsymmetric cyclic urea diols of general structure 1 can be prepared e
ither via an isourea derived from the symmetric diamine 2 or by the se
lective removal of a benzyl group from certain symmetric cyclic ureas
8, employing dissolving metal reduction. (C) 1998 The DuPont Merck Pha
rmaceutical Company. Published by Elsevier Science Ltd. All rights res
erved.