Preparation of carbamates from amines and alcohols under mild conditions
作者:David D'Addona、Christian G Bochet
DOI:10.1016/s0040-4039(01)00991-1
日期:2001.7
The practical and mild preparation of carbamates in a two-component system is described. The smooth reaction of an alcohol with 1,1′-carbonyldiimidazole, followed by subsequent trapping with an amine represents a safe replacement for phosgene derivatives.
Wavelength-selective cleavage of photolabile protecting groups
作者:Christian G Bochet
DOI:10.1016/s0040-4039(00)01050-9
日期:2000.8
The selective photocleavage of protectinggroups using monochromatic light is described. Some groups were found to react faster than others at 254 nm, whereas this trend was reversed at 419 nm. This behavior was preserved in solution mixtures of both groups. The selective control of which group is activated is thus achieved by using an influence external to the reaction mixture.