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. Ethyl-carbodiimide-hydrochloride, 626 g, 13.7 mmol) was added and the cooling bath was removed; the mixture was stirred at rt for 12h

. At-room-temperature and . Lioh, 010 g, 0.267 mmol) was added to a solution of (±)-205 (0.028 g, 0.067 mmol The mixture was stirred 10 min and the THF was evaporated. The aqueous layer was washed with CH 2 Cl 2 (2 x 3 mL) Successively, water (1 mL) and a solution of hydrochloric acid 1 M (0.25 mL) were added and the aqueous layer was extracted with EtOAc (3 x 4 mL) The combined organics layers were dried on MgSO 4, THF/H 2 O (1 mL

. Etoac, 20 to afford the product (±)-204 as a white powder

M. Ir, KBr) ? (cm -1 ) = 3370, pp.1636-1541, 1686.

1. Hz and 1. Hz, 14 (q, J = 8