Discovery of orthogonal synthesis using artificial intelligence: Pd(OAc)2-catalyzed one-pot synthesis of benzofuran and bicyclo[3.3.1]nonane scaffolds
作者:Tetsuhiko Takabatake、Keisuke Fujiwara、Sho Okamoto、Ryo Kishimoto、Natsuko Kagawa、Masahiro Toyota
DOI:10.1016/j.tetlet.2020.152275
日期:2020.9
benzofurans 4–6 was explored using the artificial intelligence system SYNSUP. Among the routes proposed by SYNSUP, we investigated a three-step synthesis of 7a using methyl 4-ally-3-oxohept-6-enoate (10). A new catalytic reaction was found in which 7a was directly obtained from 10 in a single step with a yield of 24%. It was found that this chemical yield could be increased to 74% when methyl 3-allyl-2-hydroxybenzoate
为共同的中间,将2-甲酰基苯并呋喃-7-羧酸甲酯(A合成路线图7A),以有效地组装的生物活性3点的苯并呋喃4 - 6是使用人工智能系统SYNSUP探讨。在SYNSUP提出的途径中,我们研究了使用4-ally-3-oxohept-6-enoate甲酯(10)进行7a的三步合成。发现了一种新的催化反应,其中一步一步直接从10中获得7a,收率为24%。发现当3-烯丙基-2-羟基苯甲酸甲酯(9a),即上述一锅转化的中间体)进行催化过程。另外,在该催化方法中,仅通过改变溶剂就从10选择性地合成了8a(76%)和11(77%)。因此,我们创建了2-甲基苯并呋喃-7-羧酸甲酯(8a)和9-氧代双环[3.3.1] nona-3,6-二烯-1-羧酸甲酯(11)的新型正交合成。最后,生物活性的苯并呋喃的全合成4 - 6使用顺利完成图7a和8a中。