作者:Yuji Takikawa、Kazuaki Shimada、Takahiro Makabe、Saburo Takizawa
DOI:10.1246/cl.1983.1503
日期:1983.10.5
2,4,6-Triaryl-dihydro-1,3,5-dithiazines reacted with electrophilic reagents such as p-TsOH·H2O, CF3COOH, HCl, and BF3·OEt2 under reflux in CH3CN to afford α-2,4,6-triaryl-1,3,5-trithianes and β-isomers (3a-d) in good yields. Reactions with I2 gave selectively 3a-d in high yields, while with ICl or IBr gave 3a-d and p-substituted benzylideneamine·HY.
2,4,6-三芳基-二氢-1,3,5-二噻嗪与亲电试剂如 p-TsOH·H2O、CF3COOH、HCl 和 BF3·OEt2 在 CH3CN 中回流反应得到 α-2,4,6 -triaryl-1,3,5-trithianes 和 β-异构体 (3a-d) 的产率很高。与 I2 反应以高产率选择性地得到 3a-d,而与 ICl 或 IBr 反应得到 3a-d 和对位取代的亚苄基胺·HY。