Abstract
Synth. Commun. 2004, 34, 199
A Convenient Method for the Preparation of 7-Cyanocamptothecins and 7-Cyanomappicine Ketones
Biswanath Das,* K. V. N. S. Srinivas, I. Mahender, N. Ravindranath, and C. Ramesh
Organic Chemistry Division-I, Indian Institute of Chemical Technology, Hyderabad, India
Abstract
Synth. Commun. 2004, 34, 205
Microwave-Assisted Solvent-Free Synthesis of trans-Cinnamic Acids Using Lithium Chloride as Catalyst
K. Mogilaiah* and G. Randheer Reddy
Department of Chemistry, Kakatiya University, Warangal, India
trans-Cinnamic acids are prepared in a solventless operation by microwave irradiation of aromatic aldehydes and malonic acid in the presence of lithium chloride as catalyst.
Abstract
Synth. Commun. 2004, 34, 211
An Efficient and Regioselective Deprotection Method for Acetylated Glycosides
Jubiao Li and Yanguang Wang*
Department of Chemistry, Zhejiang University, Hangzhou, P.R. China
A new regioselective 2-O-deacetylation methodology of acetylated glycosides using 85% hydrazine hydrate in THF is described. Using this method, acetylated 1-thio-glycoside could also be selectively deprotected to give 3-O-deprotected compound.
Abstract
Synth. Commun. 2004, 34, 219
Soluble Polymer-supported Synthesis of α-Amino Acid Derivatives
Chunling Hu, Zuxing Chen,* and Guichun Yang
Faculty of Chemistry and Material Science, Hubei University, Wuhan, Hubei, P.R. China
A practical and efficient synthesis of N-substituted α-amino acid derivatives on soluble polymer support is described.
Abstract
Synth. Commun. 2004, 34, 225
Effect of Ionic Liquids on the Chemical Equilibrium of Esterification of Carboxylic Acids With Alcohols
Tao Jiang, Yanhong Chang, Guoying Zhao, Buxing Han,* and Guanying Yang
Center for Molecular Science, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, P.R. China
The esterification of carboxylic acids with alcohols catalyzed by para-toluene sulfonic acid (pTSA) was studied in different room temperature ionic liquids. The chemical equilibrium of esterification can be tuned by using ionic liquids as solvents.
Abstract
Synth. Commun. 2004, 34, 239
First Synthesis of a Trisaccharide of Glycosylkaemferide: A Resistance Factor in Carnations
Mamoru Koketsu,* Motoaki Kuwahara, Hisako Sakurai and Hideharu Ishihara*
Department of Chemistry, Faculty of Engineering, Gifu University, Gifu, Japan
A trisaccharide of glycosylkaemferide, a resistance factor in carnation, was synthesized in a practical way.
Abstract
Synth. Commun. 2004, 34, 247
A Simple and Efficient Method for the Preparation of Heterocyclic N-Oxide
Ping Zhong,1,* Sheng-rong Guo,1,2 and Cai-sheng Song2
1Department of Chemistry, Wenzhou Normal College, Wenzhou, P.R. China
2Department of Chemistry, Jiangxi Normal University, Nanchang, P.R. China
Heterocyclic nitrogen compounds 1 are readily oxidized to heterocyclic N-oxides 3 by a solution of water, acetic acid, sodium acetate and trichloroisocyanuric acid 2 in acetonitrile and methylene chloride.
Abstract
Synth. Commun. 2004, 34, 255
A Convenient Synthesis of Novel N′-tert-butyl-N′-Substituted Benzoyl-N-(Substituted Phenyl)aminocarbonylhydrazines and Their Derivatives
Qingmin Wang and Runqiu Huang*
State Key Laboratory of Elemento-Organic Chemistry, Research Institute of Elemento-Organic Chemistry, Nankai University, Tianjin, P.R. China
N-tert-Butyl-N-substituted benzoylhydrazines were prepared in two convenient procedures with good yields.
Abstract
Synth. Commun. 2004, 34, 265
Samarium Mediated Reductive Coupling Cyclization of α-Phenylsulfonylcinnamonitriles Catalyzed by Viologen under Room Temperature Conditions
Xingliang Zheng1 and Yongmin Zhang1,2,*
1Department of Chemistry, Zhejiang University, Campus Xixi, Hangzhou, P.R. China
2State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, P.R. China
Abstract
Synth. Commun. 2004, 34, 275
Synthesis of Triindolylmethanes Catalyzed by Zeolites
Jun Li,1,2 Min Zhou,1 Bogang Li,1 and Guolin Zhang1,*
1Chengdu Institute of Biology and 2Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, China
Various triindolylmethanes were synthesized by condensation of indole (or its derivatives) with indole-3-carboxaldehyde using solid acids as catalysts.
Abstract
Synth. Commun. 2004, 34, 281
One Pot Electrooxidative Conversion of Benzyl Type Alcohols Into the Corresponding Methyl Carboxylates
Mitsuhiro Okimoto,* Yuji Nagata, Satoru Sueda, and Yukio Takahashi
Department of Applied Chemistry and Circumstance Engineering, Kitami Institute of Technology, Kitami, Japan
One-pot conversion of several benzyl type alcohols into the corresponding methyl carboxylates was carried out by indirect electrooxidation using iodide ion as the electron carrier.
Abstract
Synth. Commun. 2004, 34, 287
The Alkoxy Substitution Reaction on α-Oxo Ketene Dithioacetals: A New Access to α-Oxo Ketene O,S-/O,O-Acetals
Mang Wang, Xian-Xiu Xu, Shao-Guang Sun, and Qun Liu*
Department of Chemistry, Northeast Normal University, Chang Chun, P.R. China
The substitution reaction of alkylthio group of α,α′-dioxo ketene dibenzylthioacetals by alkoxy group was performed successfully. This transformation provides a facile route to the useful α,α′-dioxo ketene O,S- and O,O-acetals.
Abstract
Synth. Commun. 2004, 34, 297
Oxidation of Thiols with Dinitrogen Tetroxide
Thomas Kramer* and Thorsten Röder*
Fakultät für Naturwissenschaften, Department Chemie, Universität Paderborn, Paderborn, Germany
Abstract
Synth. Commun. 2004, 34, 303
Selective Removal of Benzyl Carbonate Used as a Protecting Group in Carbohydrate Chemistry
Fouzi Mouffouk, Alain Morère,* Sébastien Vidal, Alain Leydet, and Jean-Louis Montero
Laboratoire de Chimie Biomoléculaire, UMR 5032 Université Montpellier II–ENSCM, Montpellier, France
A selective, clean and efficient removal of benzyl carbonate was achieved under various conditions. Interestingly, benzyl carbonate could be selectively cleaved using aminolysis conditions.
Abstract
Synth. Commun. 2004, 34, 309
Pinacol-pinacolone Rearrangement on FeCl3 Modified Montmorillonite K10
Ajit B. Shinde, Nilesh B. Shrigadi, Ramakrishna P. Bhat, and Shriniwas D. Samant*
Organic Chemistry Research Laboratory, Institute of Chemical Technology, University of Mumbai, Matunga, Mumbai, India
Pinacol-pinacolone rearrangement was investigated over Fe-modified montmorillonite K10 catalysts in liquid phase. 100% conversion of the benzopinacol was observed in 10 minutes. The catalysts are recyclable.
Abstract
Synth. Commun. 2004, 34, 315
Microwave-assisted Solvent-free Synthesis of the Substituted Spiroindolinonaphth[2,1-b][1,4]oxazines
A. V. Koshkin,1 O. A. Fedorova,1,* V. Lokshin,2 R. Guglielmetti,2 J. Hamelin,3 B. F. Texier-Boullet,3 S. P. Gromov1
Abstract
Synth. Commun. 2004, 34, 331
Synthesis of Symmetrical Methylenebis(Alkyl Hydrogen Phosphonates) by Selective Cleavage of Methylenebis(Dialkyl Phosphonates) with Morpholine
Gantla Vidyasagar Reddy,1 Hollie K. Jacobs,1 Aravamudan S. Gopalan,1,* Richard E. Barrans Jr.,2 Mark L. Dietz,2 Dominique C. Stepinski,3 and Albert W. Herlinger3
1Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM, USA
2Chemistry Division, CHM/200, Argonne National Laboratory, Argonne, IL, USA
3Chemistry Department, Loyola University Chicago, Chicago, IL, USA
A variety of dialkyl bisphonic acids can be readily prepared by a selective hydrolysis using morpholine.
Abstract
Synth. Commun. 2004, 34, 345
Multistep Microwave-assisted Solvent-free Organic Reactions: Synthesis of 4-Oxo-tetrahydro-pyridine
Mauro Panunzio,1,* Maria Antonietta Lentini,1 Eileen Campana,2 Giorgio Martelli,2 Emiliano Tamanini,1 and Paola Vicennati2
1I. S. O. F.-C.N.R, Dipartimento di Chimica “G. Ciamician,” Bologna, Italy
2I. S. O. F.-C.N.R, Bologna, Italy
A microwave mediated multistep total synthesis of 4-oxo-tetrahydro-pirydines is described.
Abstract
Synth. Commun. 2004, 34, 361
Hypervalent Iodine in Synthesis 94: A Facile Synthesis of 2-Substituted-imidazo[1,2-a]pyridines by Cyclocondensation of Alkynyl(phenyl)iodonium Salts and 2-Aminopyridine
Zhi Liu,1,2 Zhen-Chu Chen,1,2,* and Qin-G. Zheng3
1Ningbo Institute of Technology, Zhejiang University, Ningbo, P.R. China
2Department of Chemistry, Zhejiang University, XiXi Campus, Hangzhou, P.R. China
3Pharmaceutical Sciences Research Institute, Aston University, Birmingham, UK
A facile method for the synthesis of 2-substituted-imidazo[1,2-a]pyridines is achieved by cyclocondensation of alkynyl(phenyl)iodonium salts with 2-amino-pyridine.
Abstract
Synth. Commun. 2004, 34, 369
Preparation of Novel 1,2,3-Triazoles and a Comparative Study Involviing Two Recent Methods for 1,2,3-Triazole Synthesis
Júlio Onésio Ferreira Melo,1 Patrícia Melo Ratton,2 Rodinei Augusti,2 and Claudio Luis Donnici2,*
1Centro Universitário de Patos de Minas—Funda¸ão Educacional de Patos de Minas, Universidade do Estado de Minas Gerais, Brazil
2Departamento de Química, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais-Belo Horizonte—MG, Brazil