2003 Protection

200317.fm Page 63 Wednesday, April 2, 2003 2:51 PM

ProtectionO 0345 A Remarkable Bismuth Nitrate Catalyzed Protection of Carbonyl Compounds.

— The title reaction is very general, mild, and cost-effective. The method permits the preparation of dioxolanone and oxathiolanone [cf. (XV)/(XVI)] in excellent yields. — (SRIVASTAVA, N.; DASGUPTA, S. K.; BANIK*, B. K.; Tetrahedron Lett. 44 (2003) 6, 1191-1193; Dep. Mol. Pathol., Univ. Tex., Houston, TX 77030, USA; Eng.) — Mais

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