Tetrazolium N-aminides (8-10), i.e. the first derivatives of the types (A-C; Z = NY), have been prepared via the tetrazolium salts (5-7) and fully characterized. The preferred geometries of 8c-10c have been determined by a Hartree-Fock and Density Functional Theory calculation [HF/6-31G(d), B3LYP/6-31G(d)].
Tetrazolium N-Aminides: Complementary Studies on Synthesis and Properties
作者:Dietrich Moderhack、Matthias Noreiks
DOI:10.3987/com-09-11760
日期:——
Attempts are made to access the title compounds from N-amido/ureidotetrazoles (A, B; 1H- / 2H-system). These materials are provided by acylation of the respective N-aminotetrazoles (A in one step, B partly by hydrolysis of diacylated derivatives which are obtained directly). On treatment with excess dimethyl sulfate only A undergoes the necessary ring quatemization, giving rise to two isomers (ratio
尝试从 N-酰氨基/脲基四唑(A,B;1H-/2H-系统)中获取标题化合物。这些材料通过各自N-氨基四唑的酰化提供(A在一个步骤中,B部分通过直接获得的二酰化衍生物的水解)。在用过量的硫酸二甲酯处理时,只有 A 进行必要的环季铵化,产生两种异构体(比例约为 4:1);用碱进行后处理可以分离出主要的胺 (X)。该技术需要完全完成(缓慢的)季铵化过程,因为在 pH > 7 时,硫酸二甲酯会迅速影响 A 的侧链。结论实验涉及标题化合物 (X-XII) 的质子化和甲基化。
Khramchikhin, A. V.; Ostrovskii, V. A.; Stadnichuk, M. D., Journal of general chemistry of the USSR, 1991, vol. 61, # 7.2, p. 1484 - 1490
作者:Khramchikhin, A. V.、Ostrovskii, V. A.、Stadnichuk, M. D.
DOI:——
日期:——
GILCHRIST T. L.; GYMER G. E.; REES C. W., J. CHEM. SOC. PERKIN TRANS, PART 1 <JCPK-BH>, 1975, NO 18, 1747-1750
作者:GILCHRIST T. L.、 GYMER G. E.、 REES C. W.
DOI:——
日期:——
POLISHING COMPOSITION, METHOD FOR PRODUCING SAME, POLISHING METHOD, AND METHOD FOR PRODUCING SUBSTRATE
申请人:FUJIMI INCORPORATED
公开号:US20190085208A1
公开(公告)日:2019-03-21
To provide a polishing composition capable of polishing objects to be polished, such as simple substance silicon, silicon compounds, and metals, at a high polishing removal rate.
The polishing composition contains a polishing removal accelerator containing a compound having a ring structure configured to contain four or more nitrogen atoms, abrasives, and a liquid medium.
Tetrazolium N-Aminides
作者:Dietrich Moderhack、Matthias Noreiks
DOI:10.3987/com-04-10192
日期:——
Tetrazolium N-aminides (8-10), i.e. the first derivatives of the types (A-C; Z = NY), have been prepared via the tetrazolium salts (5-7) and fully characterized. The preferred geometries of 8c-10c have been determined by a Hartree-Fock and Density Functional Theory calculation [HF/6-31G(d), B3LYP/6-31G(d)].