Synthesis of 1,3-Selenazines and 1,3-Selenazolidines via Intramolecular Addition of<i>N</i>-Allylselenoureas
作者:Mamoru Koketsu、Takashi Kiyokuni、Tsutomu Sakai、Hiromune Ando、Hideharu Ishihara
DOI:10.1246/cl.2006.626
日期:2006.6
The regiochemistry of intramolecular addition of N-allylselenoureas leading to 2-imino-5-methyl-l,3-selenazolidines or 2-amino-5-iodo-4H-5,6-dihydro-l,3-selenazines depends on the treatment of hydrogen chloride or iodine: treatment of hydrogen chloride with N-allylselenoureas affords preferentially 2-imino-5-methyl-l,3-selenazolidines through 5-endo closure, whereas treatment of iodine affords preferentially
N-烯丙基硒脲的分子内加成导致 2-imino-5-methyl-l,3-selenazolidines 或 2-amino-5-iodo-4H-5,6-dihydro-l,3-selenazines 的区域化学取决于治疗氯化氢或碘:用 N-烯丙基硒脲处理氯化氢通过 5-内封闭优先提供 2-亚氨基-5-甲基-l,3-硒唑烷,而碘处理优先提供 2-氨基-5-碘-4H -5,6-dihydro-1,3-selenazines 通过 6-exo 闭合。