Borthakur, R. C.; Borthakur, N.; Rastogi, R. C., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1984, vol. 23, # 3, p. 244 - 248
An Inverse Electron Demand Azo-Diels–Alder Reaction of <i>o</i>-Quinone Methides and Imino Ethers: Synthesis of Benzocondensed 1,3-Oxazines
作者:Dmitry V. Osipov、Vitaly A. Osyanin、Guzel’ D. Khaysanova、Elvira R. Masterova、Pavel E. Krasnikov、Yuri N. Klimochkin
DOI:10.1021/acs.joc.8b00692
日期:2018.4.20
the reactions of o-quinone methide precursors with iminoethers. The reaction provides a versatile route to substituted 1,3-benzoxazines. The proposed reaction mechanism involves the generation of the o-quinone methide intermediates, imino-Diels–Alder reaction, and elimination. This cascade process is a rare example of the participation of iminoethers as dienophiles.
Synthesis of the β<sub>2</sub> Agonist (<i>R</i>)-Salmeterol Using a Sequence of Supported Reagents and Scavenging Agents
作者:Robert N. Bream、Steven V. Ley、Panayiotis A. Procopiou
DOI:10.1021/ol020128g
日期:2002.10.1
graphicThe enantioselective synthesis of (R)-salmeterol has been achieved by using a sequence of supported reagents and sequestering agents. The saligenin core was installed by a regiospecific alkylation and a chiral auxiliary approach was employed to introduce the desired stereochemistry via a diastereoselective reduction.
Design, synthesis, ADME characterization and antileishmanial evaluation of novel substituted quinoline analogs
作者:Vadiraj S. Gopinath、Mukkavilli Rao、Rahul Shivahare、Preeti Vishwakarma、Sweta Ghose、Ashok Pradhan、Ramamohan Hindupur、Koushik Das Sarma、Suman Gupta、Sunil K. Puri、Delphine Launay、Denis Martin
DOI:10.1016/j.bmcl.2014.03.065
日期:2014.5
In vitro ADME characterization of the lead compound 1 identified for visceral leishmaniasis was undertaken and further structural analogs were synthesized for antileishmanial screening. Compound 1 was highly permeable in intestinal PAMPA model (31 x 10(-6) cm/s) and was moderately bound to mouse and human plasma proteins (% bound 85-95%), its blood to plasma concentration ratio was less than 1, but the compound was unstable in blood. Compound 1 was found to have no CYP450 liability with CYP2C9, 2C19, 2D6 and 3A4. It showed inhibition with CYP1A2 with an IC50 value of 0.50 mu M. Analogs of 1 were synthesized and subsequently characterized for in vitro activity against the intracellular form of Leishmania donovani. Resulting quinolines were found to have similar efficacy as 1 against the parasite. Compounds 8b and 8f were found to be the most active with IC50 values of 0.84 mu M and 0.17 mu M, respectively compared to 0.22 mu M for compound 1. Of all the analogs tested, 8d was stable in hamster, mouse and human liver microsomes but lost the efficacy with an IC50 of 6.42 mu M. Based on the in vitro efficacy and DMPK profile, compounds 8b and 8f seem the best candidates to be screened in further assays. (C) 2014 Elsevier Ltd. All rights reserved.