作者:Frederik D. Deroose、Pierre J. De Clercq
DOI:10.1016/s0040-4039(00)79354-3
日期:1993.7
enantioselective 14-step synthesis of (+)-biotin from L-cysteine is reported based upon an intramolecular 1,3-dipolar cycloaddition sequence involving (i) elimination of bromide 8 to the endocyclic thioenol ether 9, (ii) thermolysis of the ene carbamoyl azide 9 to the exocyclic thioenol ether 10. Both the synthesis of 8 and the final transformation of 10 into (+)-biotin are based upon literature precedents
基于分子内的1,3-偶极环加成序列,报道了从L-半胱氨酸在概念上简单的对映选择性的14步合成(+)-生物素,涉及(i)将溴化物8消除至环内硫烯醇醚9,(ii)热解烯氨基甲酰基叠氮化物9与环硫代烯醇醚10的反应。8的合成和10最终转化为(+)-生物素的过程均基于文献先例。