Synthesis and antifertility activity of 3,9-dihydroxy-5,6,6a.alpha.,6b.beta.,11,12,12a.beta.,12b.alpha.-octahydrodibenzo[a,g]biphenylene, a structural relative of diethylstilbestrol
摘要:
The title diphenol, 1a, was synthesized from p,p'-dihydroxy-alpha-truxillic acid and shown to be active as an oral postcoital antifertility agent in rats: ED100 = 100 (micrograms/kg)/day. The oral uterotropic potency was estimated to be 16% of that of diethylstilbestrol (95% confidence limits of potency 8--35%). The structure of the diphenol, 1a, was confirmed by single-crystal X-ray analysis of the dimethyl ether.
Remarkably high homoselectivity in [2 + 2] photodimerization of trans-cinnamic acids in multicomponent systems
作者:Thanh Binh Nguyen、Ali Al-Mourabit
DOI:10.1039/c6pp00201c
日期:2016.9
[2 + 2] homoadducts were exclusively obtained with total regio- and stereo-selectivities when a suspension of several solid photoactive trans-cinnamic acids in cyclohexane was stirred and irradiated.
Protein Kinase Inhibitors and Methods for Identiying Same
申请人:Lawrence S. David
公开号:US20070254312A1
公开(公告)日:2007-11-01
Inhibitors of protein kinase C (PKC)α, PKCδ and PKCζ are provided which are selective for those PKC isotypes. Combinatorial libraries for identifying protein kinases are also provided, as are methods of identifying protein kinases using those libraries. Additionally, methods of treating a mammal having a deleterious condition, where the condition is dependent on a protein kinase for induction or severity, are provided. Methods of inhibiting protein kinases are also provided.
4,4′-Dihydroxytruxillic acid as a component of the cell walls of the bambooPhyllostachys edulis
作者:Sanro Tachibana、Katsumi Ohkubo、G.H. Neil Towers
DOI:10.1016/0031-9422(91)83010-i
日期:1992.1
Abstract 4,4′-Dihydroxytruxillicacid, a photodimer ofp-coumaric acid, as well asp-coumaric and ferulic acids, were identified from alkaline hydrolysates of the cellwalls of stems, leaves and shoots of bamboo (Phyllostachys edulis). The truxillic acid content was highest in leaves but was only about 1/1000th that of wall boundp-coumarate. Truxillic acid levels increased on grinding in a Wiley mill
Divaccinosides A–D, four rare iridoid glucosidic truxillate esters from the leaves of Vaccinium bracteatum
作者:Yong-Mei Ren、Chang-Qiang Ke、Chunping Tang、Sheng Yao、Yang Ye
DOI:10.1016/j.tetlet.2017.05.013
日期:2017.6
Divaccinosides A–D (1–4), four rare iridoid glucoside cyclodimers in the truxillate forms, were characterized from the leaves of Vaccinium bracteatum. They were presumably biosynthesized from two known iridoid glucoside monomers, vaccinoside (5) and 10-O-trans-p-coumaroyl-6α-hydroxyl-dihydromonotropein (6), via a [2+2] cycloaddition reaction. The structures of the new compounds were established by
Abstract Three new phenolicacidderivatives, 1,3- O -di- trans - p -coumaroylglycerol, 1,2- O -di- trans - p -coumaroylglycerol and chokorin were isolated fromstromata of Epichloetyphina on timothy plants Phleumpratense . Their structures were established by spectroscopic and chemical means.