An environmentally friendly protocol for oxidative halocyclization of tryptamine and tryptophol derivatives
作者:Jun Xu、Rongbiao Tong
DOI:10.1039/c7gc01341h
日期:——
environmentally friendly and efficient protocol (KX/oxone) for oxidative halocyclization of tryptamine/tryptophol derivatives was developed and demonstrated with 28 examples and concisetotalsynthesis of cyclotryptamine alkaloid protubonines A and B. The distinct advantage of this protocol over all previous methods is that no organic byproduct is generated from a halogenating agent or oxidant, thus greatly reducing
Novel 7-aminobenzocycloheptenes of the formula ##STR1## wherein X is selected from the group consisting of --NO.sub.2, --NH.sub.2, CH.sub.3 O-- and --OH, R.sub.1 is selected from the group consisting of hydrogen and alkyl of 1 to 5 carbon atoms, R.sub.2 is alkyl of 1 to 5 carbon atoms and R.sub.1 and R.sub.2 together with the nitrogen atom to which they are attached form a saturated heterocycle of 4 to 6 ring carbon atoms optionally containing a second heteroatom in the ring and optionally substituted with an alkyl of 1 to 5 carbon atoms and their non-toxic, pharmaceutically acceptable acid addition salts in optically active or racemic mixture form having antidepressant activity and a process for their preparation.
申请人:UNIVERSITY OF LOUISVILLE RESEARCH FOUNDATION, INC.
公开号:US20190176134A1
公开(公告)日:2019-06-13
Some embodiments of the invention include inventive catalysts (e.g., compounds of Formula (I) or (Ia)). Other embodiments include compositions comprising the inventive catalysts. Some embodiments include methods of using the inventive catalysts (e.g., in hydrofluorination of an organic compound). Further embodiments include methods for making the inventive catalysts. Additional embodiments of the invention are also discussed herein.
Molten potassium pyrosulfate: The reactions of seven metal oxalates
作者:P.J. Mineely、S.A. Tariq
DOI:10.1016/0040-6031(87)80049-7
日期:1987.4
SO 4 and the corresponding metal sulfates, which, in the reactions of ZnC 2 O 4 and K 2 TiO(C 2 O 4 ) 2 2H 2 O, probably existed as K 2 [Zn(SO 4 ) 2 ] and K 4 [Ti(SO 4 ) 4 ], respectively. Water was found to be an additional product in the hydrated metaloxalatereactions. The stoichiometries of these reactions have been established from the thermogravimetric and acidimetric results.
摘要 Li 2 C 2 O 4 、Na 2 C 2 O 4 、K 2 C 2 ·H 2 O、CaC 2 ·H 2 O、ZnC 2 O 4 、La 2 (C 2 O 4 ) 3 和K的反应使用热分析方法研究了 2 TiO(C 2 O 4 ) 2 · 2H 2 O 和 K 2 S 2 O 7 。通过各种技术分析反应产物。发现无水草酸盐与 K 2 S 2 O 7 反应,生成 CO 2 和 CO 的混合物,形成 K 2 SO 4 和相应的金属硫酸盐,在 ZnC 2 O 4 和 K 2 的反应中TiO(C 2 O 4 ) 2 2H 2 O,可能分别以K 2 [Zn(SO 4 ) 2 ] 和K 4 [Ti(SO 4 ) 4 ] 的形式存在。发现水是水合金属草酸盐反应中的附加产物。这些反应的化学计量是根据热重和酸度结果确定的。
Charge transfer in mixed-valence solids. Part 9. Preparation, characterization, and optical spectroscopy of the mixed-valence mineral voltaite [aluminium pentairon(II) tri-iron(III) dipotassium dodecasulphate 18-hydrate] and its solid solutions with cadmium(II)
作者:David Beveridge、Peter Day
DOI:10.1039/dt9790000648
日期:——
temperatures down to 4.2 K (5 000–25 000 cm–1). From the spectrum of cadmiumvoltaite, iron(III) ligand-field transitions are found at 14 000 (6A1g→4T1g), 19 000 (6A1g→4T2g), and 23 500 cm–1(6A1g→4A1g,4Eg). In the mixed-valence crystals a broad absorption band centred at 16 500 cm–1 is the intervalence charge-transfer transition. Its half-width and integrated band area vary only slightly from room temperature
火山灰,K 2 Fe II 5 Fe III 3 Al [SO 4 ] 12 ·18H 2 O晶体和固溶体K 2 Fe II x Cd II 5– x Fe III 3 Al [SO 4 ] l2 ·18H 2 O,已经通过化学分析和X射线衍射制备并表征。固溶体是同构的[ O h 8(Fd 3 c)],仅与27.25(x= 5)至27.49Å(x = 0)。漫反射光谱被记录在室温(5 000-50000厘米-1)和单晶透射光谱在温度下降到4.2 K(5 000-25000厘米-1)。从镉镉的光谱中,发现铁(III)配体场跃迁为14 000(6 A 1 g → 4 T 1 g),19 000(6 A 1 g → 4 T 2 g)和23 500 cm –1(6 A 1 g → 4 A 1g, 4 E g)。在混合价晶体中,以16 500 cm –1为中心的宽吸收带是间隔电荷转移跃迁。从室温到4