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Deprotection O 0345 Mild and Chemoselective Deacetylation Method Using a Catalytic Amount of Acetyl Chloride in Methanol. -The procedure allows the efficient removal of acetyl groups in the presence of other acid-sensitive protecting groups. -(YEOM, C.-E.; LEE, S. Y.; KIM, Y. J.; KIM*, B. M.; Synlett 2005, 10, 1527-1530; Sch. Chem., Seoul Natl. Univ., Seoul 151-747, S. Korea; Eng.) -Mais 47-055

Amination O 0268 1,8-Diazabicyclo[5.4.0]undec-7-ene (DBU)-Promoted Efficient and Versatile aza-Michael Addition. -Various nitrogen nucleophiles such as primary and acyclic and cyclic secondary amines are efficiently introduced to α,β-unsaturated carbonyl compounds in the presence of 0.5 equiv. DBU. Compared to other tertiary amines, it is uniquely effective. Two other representative nucleophiles, a thiol and a phosphite, undergo the corresponding hetero-Michael addition reaction with excellent yields. -(YEOM, C.-E.; KIM, M. J.; KIM*, B. M.; Tetrahedron 63 (2007) 4, 904-909; Dep.

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