l-Cysteine as a water-soluble cation scavenger in the removal of the 2,4,6-trimethoxybenzyl group from thiols

Ionic liquid-supported aldehyde: a highly efficient scavenger for primary amines

Novel aldehyde-functionalized ionic liquids have been synthesized and used as scavengers for primary amines in the synthesis of secondary amines. The yields of secondary amines are high (82-90%) with high purity. The advantages of the protocol over that with a polymer-supported aldehyde scavenger are the shorter reaction time, the homogeneous reaction medium, the high level of loading of the aldehyde group, easy monitoring of reaction, and characterization of intermediates.

Synthesis of the β-hydroxydopa–γ-hydroxy-δ-sulfinylnorvaline component of ustiloxins A and B

The dopa-sulfinylnorvaline component of ustiloxins A and B has been prepared using an Evans salen-Al-catalysed aldol reaction with a 6-mercaptoisovanillin derivative, followed by incorporation of the norvaline group and asymmetric oxidation of the resulting sulfide to give the corresponding sulfoxide.