作者:Kevin M. Smith、Dharma Kishore
DOI:10.1016/s0040-4020(01)88697-x
日期:——
Owing to symmetry limitations inherent in the a,c-biladiene route, that through b-bilenes is shown to be more generally effective for the synthesis of biliverdins. The key step in the transformation of the biladiene or bilene into biliverdin involves treatment with bromine in trifluoroacetic acid, and this affords biliverdin in high yield. The route is proposed to proceed through a 1,19-dibromo-a,b
讨论了由单吡咯和完整的金属卟啉和金属氯霉素的环裂解合成各种哺乳动物和藻类胆色素模型的方法。etiobiliverdin IV的先前报道的合成γ(6从5-溴-5'- bromomethyldipyrrylmethene氢溴酸盐(的自缩合)5)被修改通过1,19-二-得起biliverdins一种新型,高效和一般路线叔丁氧基羰基一,ç -biladienes或- b -bilenes。由于a,c-二苯二烯路线固有的对称性限制,即通过b已显示出-胆甾醇对biliverdins的合成更普遍有效。将胆二烯或胆二烯转化为胆绿素的关键步骤涉及在三氟乙酸中用溴处理,这可以高产率得到胆绿素。路线提出通过1,19-二溴进行一个,b,c ^ -bilitriene然后1,19-二- (三氟乙酰氧基) -一个,b,c ^ -bilitriene,虽然这些中间体不分离。