- Protecting-Group-Based Colorimetric Monitoring of Fluorous-Phase and Solid-Phase Synthesis of Oligoglucosamines.
[作者:Ko, Kwang-Seuk;Park, Gisun;Yu, Yang;Pohl, Nicola L.;,期刊:Organic Letters, 页码:5381-5384 , 文章类型: 研究论文,,卷期:2008年10-23]
- A new hydroxyl protecting group, nitrophthalimidobutyric (NPB) acid, has been synthesized in one solvent-free step for colorimetric monitoring of reaction cycles upon its facile removal with hydrazine acetate in the soli...
- Total Synthesis of (-)-Amathaspiramide F.
[作者:Sakaguchi, Kazuhiko;Ayabe, Miki;Watanabe, Yusuke;Okada, Takuya;Kawamura, Kazushige;Shiada, Tetsuro;Ohfune, Yasufumi;,期刊:Organic Letters, 页码:5449-5452 , 文章类型: 研究论文,,卷期:2008年10-23]
- The stereoselective total synthesis of the marine alkaloid (-)-amathaspiramide F (I) was achieved from the a-hydroxy-a-ethynylsilane 2. The crucial steps in this synthesis involved not only the enolate Claisen rearrange...
- Amino- and Hydroxy-Functionalized 11-Azaartemisinins and Their Derivatives.
[作者:Singh, Ajit Shankar;Verma, Ved Prakash;Hassam, Mohammad;Krishna, Naikade Niraj;Puri, Sunil K.;Singh, Chandan;,期刊:Organic Letters, 页码:5461-5464 , 文章类型: 研究论文,,卷期:2008年10-23]
- An efficient conversion of artemisinin into three new amino- and hydroxy-functionalized 11-aza prototypes I (X = NH2, OH, HOCH2CH2) has been achieved on a multigram scale by reaction with hydrazine, hydroxylamine, and 2-...
- Synthesis and Structure of Mycolactone E Isolated from Frog Mycobacterium.
[作者:Aubry, Sylvain;Lee, Richard E.;Mahrous, Engy A.;Small, Pam L. C.;Beachboard, Dia;Kishi, Yoshito;,期刊:Organic Letters, 页码:5385-5388 , 文章类型: 研究论文,,卷期:2008年10-23]
- The structure of mycolactone E (I), isolated from the frog pathogen Mycobacterium liflandii, was established via org. synthesis. Within the mycolactone family of metabolites, a structural variation has been seen only at...
- Encapsulation of Guests within a Gated Molecular Basket: Thermodynamics and Selectivity.
[作者:Wang, Bao-Yu;Bao, Xiaoguang;Stojanovic, Sandra;Hadad, Christopher M.;Badjic, Jovica D.;,期刊:Organic Letters, 页码:5361-5364 , 文章类型: 研究论文,,卷期:2008年10-23]
- structural, yet dynamic, feature of the host has been revealed to permit the formation of a transient enclosed space capable of contg. haloalkanes, whose size/shape, electronic and entropic attributes contributed to the ...
- Highly (E)-Selective Wadsworth-Emmons Reactions Promoted by Methylmagnesium Bromide.
[作者:Claridge, Timothy D. W.;Davies, Stephen G.;Lee, James A.;Nicholson, Rebecca L.;Roberts, Paul M.;Russell, Angela J.;Smith, Andrew D.;Toms, Steven M.;,期刊:Organic Letters, 页码:5437-5440 , 文章类型: 研究论文,,卷期:2008年10-23]
- An exptl. simple protocol for the very highly (E)-selective Wadsworth-Emmons reaction [(E):(Z) selectivities in excess of 180:1 in some cases] of a range of straight-chain and branched aliph., substituted arom., and base...
- Synthesis of a New Water-Soluble Oligo(phenylenevinylene) Containing a Tyrosine Moiety for Tyrosinase Activity Detection.
[作者:Feng, Xuli;Feng, Fude;Yu, Minghui;He, Fang;Xu, Qingling;Tang, Hongwei;Wang, Shu;Li, Yuliang;Zhu, Daoben;,期刊:Organic Letters, 页码:5369-5372 , 文章类型: 研究论文,,卷期:2008年10-23]
- A new water-sol. oligo(phenylenevinylene) contg. a tyrosine unit (OPV-Tyr) was synthesized as a fluorescent probe to optically detect tyrosinase activity. Upon the addn. of tyrosinase, the tyrosine moiety was oxidized t...
- Highly Efficient Energy Transfer in Subphthalocyanine-BODIPY Conjugates.
[作者:Liu, Jian-Yong;Yeung, Hoi-Sze;Xu, Wei;Li, Xiyou;Ng, Dennis K. P.;,期刊:Organic Letters, 页码:5421-5424 , 文章类型: 研究论文,,卷期:2008年10-23]
- Two novel subphthalocyanines substituted axially with a boron dipyrromethene (BODIPY) or distyryl BODIPY moiety have been synthesized. Both systems exhibit a highly efficient photoinduced energy transfer process, either...
- Total Synthesis of (-)-Agelastatin A.
[作者:Yoshimitsu, Takehiko;Ino, Tatsunori;Tanaka, Tetsuaki;,期刊:Organic Letters, 页码:5457-5460 , 文章类型: 研究论文,,卷期:2008年10-23]
- A new route to (-)-agelastatin A (I) is reported. The requisite nitrogen functionalities of the agelastatin core have been installed by intramol. aziridination of an azidoformate and subsequent regioselective azidation,...
- First Total Synthesis of (?-3-Hydroxy-11-norcytisine: Structure Confirmation and Biological Characterization.
[作者:Yohannes, Daniel;Hansen, Camilla P.;Akireddy, Srinivasa Rao;Hauser, Terry A.;Kiser, Melanie N.;Gurnon, Nicholas J.;Day, Cynthia S.;Bhatti, Balwinder;Caldwell, William S.;,期刊:Organic Letters, 页码:5353-5356 , 文章类型: 研究论文,,卷期:2008年10-23]
- The first total synthesis of (?-3-hydroxy-11-norcytisine (I), the racemate of natural product previously isolated from Laburnum anagyroides, structurally related to (-)-cytisine (II) and a benchmark ligand at neuronal ni...
- Expeditious Total Syntheses of Camptothecin and 10-Hydroxycamptothecin.
[作者:Liu, Guan-Sai;Dong, Qing-Li;Yao, Yuan-Shan;Yao, Zhu-Jun;,期刊:Organic Letters, 页码:5393-5396 , 文章类型: 研究论文,,卷期:2008年10-23]
- New expeditious total syntheses of (S)-camptothecin (16% overall yield, 95% ee) and (S)-10-hydroxycamptothecin (14% overall yield, 99% ee) have been accomplished, resp., starting from readily available and inexpensive ma...
|