Functionalized Dithia(2,5)pyridinophanes as Vitamin B<sub>6</sub>Analogues. Synthesis, Properties, and Catalytic Activity for Racemization Reaction
作者:Masaaki Iwata、Hiroyoshi Kuzuhara
DOI:10.1246/bcsj.58.2502
日期:1985.9
(n+3)-dithia[m](2,5)pyridinophanes incompletely extruded sulfur atoms under various conditions. Because of instability and low preparative yield of 15-hydroxy-16-formyl[2]paracyclo[2](2,5)pyridinophane, dithia-containing phanes, (n+9)-hydroxy-(n+10)-formyl-2,(n+3)-dithia[m](2,5)pyridinophanes [26a (n=4), 26b (n=6), 26c (n=8); m=n+4], 17-hydroxy-18-formyl-2,11-dithia[3]paracyclo[3](2,5)pyridinophane (27), and
探索合成路线以实现基于来自盐酸吡哆醇的功能化二硫杂 (2,5) 吡啶并烷的结构基础设计的维生素 B6 模型,并与吡哆醛相比,检查了外消旋反应的催化剂效力。通过 3,4'-O-异亚丙基吡哆醇 2',5'-二氯化物与 α,ω-二硫醇反应,以良好的收率合成了二硫杂 (2,5) 吡啶并烷。对于 dithia[3]paracyclo[3](2,5)pyridinophanes,接合硫原子被光化学挤出,而 2,(n+3)-dithia[m](2,5)pyridinophanes 在各种条件下不完全挤出硫原子。由于 15-羟基-16-甲酰基 [2] 对环 [2](2,5) 吡啶烷、含二硫杂的烷、(n+9)-羟基-(n+10)-甲酰基-的不稳定和低制备产率2,(n+3)-dithia[m](2,5)pyridinophanes [26a (n=4), 26b (n=6), 26c (n=8); m=n+4]