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首页> 外文期刊>Zeitschrift fur Naturforschung, B. A Journal of Chemical Sciences >X-Ray Structure Analysis of Substituted 5-(2, 3-Dihydro-7-benzofuryl)-1-methylpyrazolo (4, 3-d)pyrimidin-7-one (Biagra)(1)
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X-Ray Structure Analysis of Substituted 5-(2, 3-Dihydro-7-benzofuryl)-1-methylpyrazolo (4, 3-d)pyrimidin-7-one (Biagra)(1)

机译:取代的5-(2,3-二氢-7-苯并呋喃基)-1-甲基吡唑并(4,3-d)嘧啶-7-一(Biagra)(1)的X射线结构分析

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摘要

X-ray crystal structure data for the title compound dihydrobenzofuryl-pyrazolo [4, 3-d] pyrimidin-7-one (2) reveal that the two bicyclic heteroaryl systems are virtually coplanar along their joint C(5)-C(11) axis with an interplanar angle of 1.13 deg. This planar conformation is held by an intramolecular hydrogen bond between the pyrimidinone N(6)-H and the O(17) lone pair of the dihydrobenzofuryl moiety. The spatial interatomic distance for O(17)-N(6), determined as 2.04 A, favours this H-bridge.
机译:标题化合物二氢苯并呋喃基-吡唑并[4,3-d]嘧啶-7-(2)的X射线晶体结构数据显示,两个双环杂芳基系统沿它们的联合C(5)-C(11)实际上共面平面角为1.13度的轴该平面构象由嘧啶酮N(6)-H和二氢苯并呋喃基部分的O(17)孤对之间的分子内氢键保持。 O(17)-N(6)的空间原子间距离确定为2.04 A,有利于该H桥。

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