the pyrrolo-1,4-benzodiazepine family, was synthesized using a short and efficient route. The key construction of the seven-membered ring by amide bond formation was realized via a chemoselective Ar-NO2 reduction using TiCl3 under acidic conditions, followed by a spontaneous cyclization. This synthesis was easily scaled up to 80 g, and it should be amenable to the production of larger quantities.
(+)-Oxo-tomaymycin,
吡咯并-1,4-苯并二氮杂family家族的天然物质,是使用一种短而有效的途径合成的。通过在酸性条件下使用TiCl 3进行
化学选择性的Ar-NO 2还原,然后进行自发环化,可实现通过酰胺键形成七元环的关键结构。该合成很容易按比例放大到80 g,应该适合于大量生产。