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Deprotection O 0345Efficient and Selective Cleavage of the t-Butoxycarbonyl Group from Di-t-butylimidodicarbonate Using Catalytic Bismuth(III) Bromide in Acetonitrile. -Various amino acid esters and amines (VIII) are selectively mono-deprotected in the presence of BiBr3. The method tolerates the presence of other protecting groups. In the case of cysteine (VI), however, the S-Boc group is also removed. -(ZHENG, J.; YIN, B.; HUANG, W.; LI, X.; YAO, H.; LIU, Z.; ZHANG, J.; JIANG*, S.; Tetrahedron Lett.

Facile Synthesis of Benzoxazoles from 1,1-Dibromoethenes. -A base-mediated direct coupling of 2-aminophenols with 1,1-dibromoethenes provides a new route to the synthesis of benzoxazoles. -(TAO, K.; ZHENG, J.; LIU, Z.; SHEN, W.; ZHANG*, J.; Tetrahedron Lett. 51 (2010) 24, 3246-3249,