Selective synthesis of 2-substituted 4-carboxy oxazoles, thiazoles and thiazolidines from serine or cysteine amino acids
作者:Barbara Di Credico、Gianna Reginato、Luca Gonsalvi、Maurizio Peruzzini、Andrea Rossin
DOI:10.1016/j.tet.2010.09.104
日期:2011.1
The synthesis of new 4-carboxy oxazoles, thiazoles and thiazolidines by condensation of serine or cysteine with aldehydes or acids is described. Due to the optimization of a mild and selective procedure, which takes advantage of the positive effect of microwave irradiation on the MnO2 mediated oxidation step, the 2-substituted-4-carboxy derivatives can be obtained in multi-gram scale. Examples of coordination
描述了通过丝氨酸或半胱氨酸与醛或酸的缩合合成新的4-羧基恶唑,噻唑和噻唑烷。由于优化了温和的选择性程序,该程序利用了微波辐照对MnO 2介导的氧化步骤的积极影响,因此可以以克数形式获得2-取代的-4-羧基衍生物。描述了对Ni(II)和Co(II)的配位化学的实例。