(3aα,6β,6aα)-6-Methyltetrahydro-1H-thieno[3,4-b]pyrrol-2(3H)-one (2) was prepared as a crippled analogue of biotin. The key synthetic step involved hydrogenation of 6-methyl-1H- thieno [3,4-b]pyrrol-2(3H)-one on palladium to introduce the necessary all-cis configuration. Both compounds were weak inhibitors of the biotin-dependent wheat acetyl-CoA carboxylase compared to substrates or the potent herbicidal inhibitors of this enzyme, but were more potent than biotin or imidazolidone. Neither compound inhibited the biotin-dependent transcarboxylase component of bacterial acetyl-CoA carboxylase, nor did they significantly inhibit the growth of Arabidopsis thaliana.
(3aα,6β,6aα)-6-甲基四氢-1H-噻吩并[3,4-b]吡咯-2(3H)-酮 (2) 作为生物素的残缺类似物被制备出来。合成的关键步骤是在钯上氢化 6-甲基-1H-噻吩并[3,4-b]吡咯-2(3H)-酮,以引入必要的全顺式构型。与底物或该酶的强效除草抑制剂相比,这两种化合物对依赖生物素的小麦乙酰-CoA 羧化酶的抑制作用较弱,但比生物素或咪唑烷酮的抑制作用更强。这两种化合物都不能抑制细菌乙酰-CoA 羧化酶中依赖生物素的转羧化酶成分,也不能显著抑制拟南芥的生长。