Long-acting contraceptive agents: Levonorgestrel esters of unsaturated acids
摘要:
Esters of levonorgestrel (13 beta-ethyl-17 beta-ethynyl-17 beta-hydroxygon-4-en-3-one) with a variety of unsaturated carboxylic acids have been synthesized for evaluation as potential long-acting, injectable contraceptive agents.
Decarboxylation syntheses of transition metal organometallics
作者:D. Anastasiou、G.B. Deacon、B.M. Gatehouse
DOI:10.1016/s0022-328x(00)99799-7
日期:1987.8
The complexes P](PPh3)L (L = py, 2,4-Me2C5H3N or 2,6-Me2C5H3N) and P]L2 [L2 = (Ph2PCH2)2 or (Ph2P)2(CH2)3] have been prepared by decarboxylation reactions between cis-PtCl2(PPh3)2 or PtCl2L2 and thallium(I) tetrafluorophthalate in boiling pyridine, or 2,4- or 2,6-dimethylpyridine. Reaction of cis-PtCl2(PPh3)2 with o-C6F4(CO2Tl)2 in pyridine at room temprature gives Pt[o-(O2C)2C6F4](PPh3)2, which undergoes
络合物P ](PPh 3)L(L = py,2,4-Me 2 C 5 H 3 N或2,6-Me 2 C 5 H 3 N)和P ] L 2 [L 2 =(Ph 2通过顺式-PtCl 2(PPh 3)2或PtCl 2 L 2之间的脱羧反应制备了PCH 2)2或(Ph 2 P)2(CH 2)3 ]。在沸腾的吡啶或2,4-或2,6-二甲基吡啶中的四氟邻苯二甲酸al(I)。室温下,吡啶中的顺式-PtCl 2(PPh 3)2与邻-C 6 F 4(CO 2 Tl)2反应得到Pt [ o-(O 2 C)2 C 6 F 4 ](PPh 3)2,在没有溶剂的情况下于160–165°C进行脱羧,得到P ](PPh 3)2。31 P NMR数据表明,在P中](PPh 3 L络合物,三苯膦被反式转变为配位氧。L= 2.6-Me 2 C 5 H 3 N的氯仿溶剂合物的晶体结构显示a,b,c,d -Pt(O,C,PN)方平面立体化学,其中2
Polysulfonylamine. CLXIV Kristallstrukturen von Metall-di(methansulfonyl)amiden. Dithallium-tris(dimesylamido-N)argentat: Ein zweidimensionales Koordinationspolymer
作者:Violeta Latorre、Peter G. Jones、Oliver Moers、Armand Blaschette
DOI:10.1002/zaac.200300095
日期:2003.8
6(6), 226, 0(6) und 236, 3(6) pm sowie N—Ag—N-Winkeln im Einklang mit dem VSEPR-Modell [149, 8(2) vs. 102, 8(2) und 107, 3(2)°]. Die unabhangigen Thalliumionen und die komplexen Gegenionen bilden Monoschicht-Substrukturen, in welchen Tl(1) zu einer (O6)-, Tl(2) zu einer (O5)-Umgebung gelangt; die Monoschichten assoziieren sich uber einen einzigen unabhangigen Satz von Tl(2)—O-Bindungen zu Doppelschichten
Die Schichtstruktur des zufallig isolierten Komplexsalzes Tl2[AgN(SO2Me)2}3] (monoklin, Raumgruppe P21/n, Z' = 1) weist zwei neuartige Aspekte auf, namlich ein (MeSO2)2N—-Ion-Ion, von der C2-symmetrischen Standardkonformation dieser Spezies abweicht und naher an Spiegelsymmetrie heranreicht, und ein Tris(dimesylamido)argentat-Anion mit trigonal-planarem AgN3-Gerust, Ag-N-Bindungslangen von 2625,6(625)
A New, Efficient and Direct Preparation of TlTp and Related Complexes with TlBH
<sub>4</sub>
Establishment of a highly reliable and safe procedure for the preparation of TlBH4 has led to, for the first time, a simple approach to TlTp-related complexes, which are known as mild and efficient Tp-transfer reagents to a variety of metals. The practical use of this method has been demonstrated by the efficient synthesis of (S,S,S)-TlTp4Bo3MeCpenta from a new and hard-to-obtain chiral pyrazole (HPz). In view
DSC thermophysics on some medium chain thallium(I) n-alkanoates: Phase transitions, thermal functions and heat capacity
作者:M.V. Roux、C. Turrión、F. Fernández-Martín、F.L.López De La Fuente、J.A.R. Cheda
DOI:10.1016/0040-6031(89)87017-0
日期:1989.3
Abstract Four members of the series of anhydrous thallium(I) n -alkanoates with medium chain-length ( n -octanoate, n -nonanoate, n -undecanoate and n -tridecanoate) have been prepared, purified, and studied by differential scanning calorimetry between 200 and 500 K. Their polymorphic and mesomorphic behaviour has also been investigated by polarization microscopy. The temperatures and enthalpy changes
despite its known toxicity, provides interesting challenges through its biology and chemistry linked to diagnosis of human pathophysiologies. Poised to investigate in-depth the structural and electronic aspects of thallium involvement in physiological processes, the synthetic exploration of aqueous binarysystems of Tl(I) with physiological binders from the family of hydroxycarboxylic acids (glycolic