Aldehydes and ketones are protected as their corresponding dithioacetals with ethane-1,2-dithiol in the presence of a catalytic amount of iodine supported on neutral alumina surface. This is a high yielding method of carbonyl group protection under mild, neutral and solvent free conditions.
醛和酮在中性铝土表面上以
乙炔-1,2-二
硫醇的对应二
硫缩醛形式得到保护,反应中使用了少量的
碘作为催化剂。这是一种在温和、中性和无溶剂条件下高产率的羰基保护方法。