Four products from the cyanoacetylation of pyrimidines: hydrogen-bonded dimers, π-stacked hydrogen-bonded chains and hydrogen-bonded chains of edge-fused rings
作者:Jorge Trilleras、John N. Low、Justo Cobo、Antonio Marchal、Christopher Glidewell
DOI:10.1107/s0108270108003557
日期:2008.3.15
bonyl]ac etonitrile, C(9)H(10)N(4)O(2)S, (I), are linked in pairs by N-H...O hydrogen bonds to form cyclic centrosymmetric R(2)(2)(4) dimers. Similar dimers formed by 2-(6-amino-1,3-dimethyl-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-ylcarbonyl)aceton itrile, C(9)H(10)N(4)O(3), (II), are reinforced by paired N-H...N hydrogen bonds and linked into chains of rings by C-H...O hydrogen bonds. The molecules
2- [6-氨基-3-甲基-2-(甲基硫烷基)-4-氧代-3,4-二氢嘧啶-5-基羰基]乙腈的分子,C(9)H(10)N(4)O (2)S,(I),通过NH ... O氢键成对连接,形成环状中心对称的R(2)(2)(4)二聚体。由2-(6-氨基-1,3-二甲基-2,4-二氧-1,2,3,4-四氢嘧啶-5-基羰基)丙酮,C(9)H(10)N( 4)O(3),(II)通过成对的NH ... N氢键增强,并通过CH ... O氢键连接成环链。2-氰基-N- [6-甲氧基-2-(甲基硫烷基)嘧啶-4-基]乙酰胺的分子C(9)H(10)N(4)O(2)S,(III)为通过NH ... N氢键连接到简单的C(6)链,并且通过pi-pi堆积相互作用将链微弱地连接成片。一个2中心的NH ... N氢键和一个3个中心的CH ...(N,O)氢键连接2-氰基-N- [6-氯-2-(甲基硫烷基)嘧啶-4-基]乙