1,3,5-Triazine 1 reacts with the lithium alkyl LiRⲠ(RⲠ= CHR2, CH2R, Me, Bun or Ph; R = SiMe3) to give 1,4-adducts which on hydrolysis yield the first simple 1,4-dihydrotriazines; however, 1 with LiNR2 or LiCR3(thf)2 gives the crystalline ring-opened 3-lithio-1,3,5,7-tetraazaheptatriene 5 or -1,3,5-triazaheptatriene 6 [LiRNC(H)NC(H)NC(H)ER}]n(µ-L) (E = N, n = 3 and L is absent 5, or E = CR, n = 2 and L = thf = tetrahydrofuran 6).
1,3,5-三嗪 1 与
锂烷基 LiRâ² (Râ² = CHR2、CH2R、Me、Bun 或 Ph;R = SiMe3)反应生成 1,4-加合物,
水解后生成第一个简单的 1,4-二氢三嗪;然而,1 与 LiNR2 或 LiCR3(thf)2 反应,可得到结晶的环状开环 3-
硫代-1,3,5,7-四氮杂庚
三烯 5 或-1,3,5-三氮杂庚
三烯 6 [LiRNC(H)NC(H)NC(H)ER}]n(µ-L) (E = N,n = 3 和 L 不存在 5,或 E = CR,n = 2 和 L = thf =
四氢呋喃 6)。