Synthesis of sulfur-containing polybromoindoles from the marine alga Laurencia brongniartii
作者:Yihan Yu、Jonathan Sperry
DOI:10.1016/j.tetlet.2023.154724
日期:2023.10
The marine alga Laurencia brongniartii produces thiobromoindoles and 3,3′-bisindoles, structural motifs rare outside this genus. A gram scale synthesis of methyl 4,6-dibromoindole-3-carboxylate followed by facile hydrolysis-decarboxylation provided a scalable route to glossobalol (4,6-dibromoindole). Methylthiolation of glossobalol followed by a [1], [2]-sulfide shift gave the natural product 2-(m
海藻Laurencia brongniartii产生硫代溴吲哚和 3,3'-双吲哚,这些结构基序在该属之外很少见。克级合成 4,6-二溴吲哚-3-甲酸甲酯,然后进行轻松水解-脱羧,提供了一条可规模化生产 Gloslobalol(4,6-二溴吲哚)的路线。舌索巴洛尔的甲硫基化,然后进行[1] , [2] - 硫醚转移,得到天然产物 2-(甲硫基)舌索巴洛尔,其在氧化自偶联 (FeCl 3 -O 2 ) 后形成受阻联杂芳基键,得到天然产物 2,2 '-双(甲硫基)-3,3'-双舌索巴洛尔。C2-硫化物在Fe(III)/O 2中起着至关重要的作用-介导的氧化偶联,提供对这些令人着迷的天然产物的生物合成的深入了解。