共查询到20条相似文献,搜索用时 15 毫秒
1.
Farhad Shirini Mohammad Ali Zolfigol Masoumeh Abedini 《Monatshefte für Chemie / Chemical Monthly》2009,140(1):61-64
Abstract Saccharin sulfonic acid was easily prepared by the reaction of saccharin with neat chlorosulfonic acid at room temperature.
This reagent is efficiently able to catalyze the chemoselective trimethylsilylation of alcohols with hexamethyldisilazane
in the presence of amines and thiols.
Graphical abstract
相似文献
2.
Farahnaz K. Behbahani Majid M. Heravi Hossien A. Oskooie 《Monatshefte für Chemie / Chemical Monthly》2009,102(2):181-184
Abstract A mild and efficient method was developed for selective benzylation and methylation of hydroxyl compounds in the presence
of a catalytic amount of ferric perchlorate. We showed that ferric perchlorate was very effective in selectively promoting
the benzylation and methylation of primary aliphatic and benzylic alcohols versus secondary aliphatic alcohols and phenolic
hydroxy groups.
Graphical abstract
相似文献
3.
Marco Rupprich Clemens Decristoforo Barbara Matuszczak 《Monatshefte für Chemie / Chemical Monthly》2009,140(4):405-407
Abstract In contrast to the results presented in a previous report, the direct conversion of alcohols to alkyl fluorides with triphenylphosphine
and potassium fluoride in CCl4/DMF under mild conditions failed.
Graphical Abstract
相似文献
4.
Min Wang Zhi-Guo Song Hong Gong Heng Jiang 《Monatshefte für Chemie / Chemical Monthly》2009,140(2):177-179
Abstract Tetrahydropyranylation of alcohols and phenols was accomplished successfully using copper nitrate and acetic acid as a synergistic
catalyst at room temperature under solvent-free condition. Compared with other synergistic catalytic systems, copper nitrate/acetic
acid proved to be the most efficient. Both alcohols (primary, secondary, tertiary, benzylic, cyclic, allyl, cinnamyl, and
furyl) and phenols reacted smoothly in high yields.
Graphical abstract
相似文献
5.
Robabeh Baharfar Seyed M. Vahdat Fatemeh G. Hakimabadi 《Monatshefte für Chemie / Chemical Monthly》2009,140(5):489-493
Abstract An efficient one-pot reaction of dialkyl acetylenedicarboxylates with 2,4-dihydroxybenzo(or aceto)phenones in the presence
of triphenylphosphine produces 5-hydroxy- and 7-hydroxycoumarin derivatives. The novel procedure features short reaction time,
fairly good yields, and simple workup.
Graphical abstract
相似文献
6.
Jitender M. Khurana Kiran Dawra Susruta Majumdar 《Monatshefte für Chemie / Chemical Monthly》2009,140(1):69-72
Abstract A very simple, convenient, and efficient procedure is reported for the 1,3-allylic carbonyl transposition of chalcones. The
transposition can be achieved by reduction of chalcones to 1,3-diarylpropan-1-ols and dehydration of the latter to give 1,3-diarylpropenes
followed by benzylic/allylic oxidation.
Graphical abstract
相似文献
7.
Do-Min Lee Gullapalli Kumaraswamy Kee-In Lee 《Monatshefte für Chemie / Chemical Monthly》2009,140(1):73-78
Abstract Catalytic transfer hydrogenation of α-tosyloxyarylketones mediated by a chiral rhodium complex using an azeotropic mixture
of formic acid/triethylamine afforded the corresponding 1-arylethanediol monotosylates in excellent yield with high enantioselectivity.
Graphical abstract
相似文献
8.
Ch. Sree Lakshmi H. Rehaman Adari Bhaskar Rao 《Monatshefte für Chemie / Chemical Monthly》2009,140(6):611-613
Abstract The enzymatic cyclization of phenoxyacetylcyanomethylenetriphenylphosphorane derivatives using pre-treated baker’s yeast cells,
a rapid one-pot assembly of heteromacrocyclic compounds, is described.
Graphical abstract
相似文献
9.
Issa Yavari S. Zahra Sayyed-Alangi Rahimeh Hajinasiri Hadi Sajjadi-Ghotbabadi 《Monatshefte für Chemie / Chemical Monthly》2009,140(2):209-211
Abstract A simple one-pot synthesis of functionalized ethyl 1,3-thiazole-5-carboxylates from the reaction of 2-chloro-1,3-dicarbonyl
compounds with thioureas or thioamides in the presence of 1-butyl-3-methylimidazolium trifluoromethanesulfonate is described.
Graphical abstract
相似文献
10.
Abstract One-pot, three-components synthesis of 2,4,6-triarylpyridines and 5-unsubstituted-3,4-dihydropyrimidin-2(1H)-ones was performed under solvent-free conditions using molecular iodine as the catalyst in moderate to good product yields.
Graphical abstract
相似文献
11.
Barahman Movassagh Mohammad Soleiman-Beigi 《Monatshefte für Chemie / Chemical Monthly》2009,140(4):409-411
Abstract A simple, highly efficient, and green protocol has been developed for preparation of sulfides from alkyl or aryl thiols and
benzyl-, allyl-, t-butyl, and adamantyl halides under solvent- and catalyst-free conditions.
Graphical abstract
相似文献
12.
Issa Yavari Rahimeh Hajinasiri S. Zahra Sayyed-Alangi 《Monatshefte für Chemie / Chemical Monthly》2009,140(2):205-207
Abstract 1-Ethyl-3-methylimidazolium bromide was used as a green recyclable alternative to volatile organic solvents for KOH catalyzed
three-component synthesis of diethyl alkylsulfanylmethylmalonates from aldehydes, diethyl malonate, and alkylthiols.
Graphical Abstract A synthesis of diethyl alkylsulfanylmethylmalonates catalyzed by KOH in an ionic liquid
相似文献
13.
Mohammad Anary-Abbasinejad Hossein Anaraki-Ardakani Fatemeh Ghanea 《Monatshefte für Chemie / Chemical Monthly》2009,140(4):397-400
Abstract The reactive intermediate generated by the reaction of alkyl isocyanides and dialkyl acetylenedicarboxylates was trapped by
ethyl carbazones to produce stable ketenimine derivatives in good yield. The reaction is characterized by mild conditions,
high selectivity, and tolerance to various functional groups.
Graphical abstract
相似文献
14.
Nagnnath D. Kokare Devanand B. Shinde 《Monatshefte für Chemie / Chemical Monthly》2009,140(2):185-188
Abstract Aromatic aldoximes were converted to the corresponding nitriles in good to excellent yields by employing phosphoric acid diethyl
ester 2-phenylbenzimidazol-1-yl ester as reagent. The method was equally effective for oximes bearing electron-donating and
electron-withdrawing substituents.
Graphical Abstract
相似文献
15.
Abstract An efficient one-pot synthesis of amidoalkyl naphthols is described. This involves the three-component reaction of 2-naphthol,
aromatic aldehydes and amide or urea in the presence of a catalytic amount of 2,4,6-trichloro-1,3,5-triazine (TCT, cyanuric
chloride) under solvent-free conditions.
Graphical abstract
相似文献
16.
Adel A.-H. Abdel-Rahman Ahmed E.-S. Abdel-Megied Hamed M. Abdel-Bary Abdel-Aleem H. Abdel-Aleem Emad M. I. Morcy Mohamed T. Shabaan 《Monatshefte für Chemie / Chemical Monthly》2009,140(5):559-564
Abstract A series of peptide derivatives conjugated with N1-protected tryptophan residue was synthesized. The prepared compounds were tested for antimicrobial activity against four
different bacterial species displaying different degrees of antibacterial activities or inhibitory actions.
Graphical Abstract
相似文献
17.
Mohammad A. Khalilzadeh Issa Yavari Zinatossadat Hossaini Hasan Sadeghifar 《Monatshefte für Chemie / Chemical Monthly》2009,140(4):467-471
Abstract A novel method for oxazine ring formation is established using the reaction of ammonium thiocyanate and acid chlorides with
napthols in the presence of N-methylimidazole to afford [1,3]oxazine-4-thione derivatives in excellent yields.
Graphical abstract
相似文献
18.
Jolanta Pawłowska Krzysztof K. Krawczyk Krystyna Wojtasiewicz Jan K. Maurin Zbigniew Czarnocki 《Monatshefte für Chemie / Chemical Monthly》2009,140(1):83-86
Abstract (+)-Lortalamine was synthesised using (S)-(−)-α-methylbenzylamine as a chiral auxiliary. The stereochemistry of an intermediate compound was established on the basis
of X-ray crystallography, allowing unambiguous assignment of the absolute configuration.
Graphical abstract
相似文献
19.
Waldemar Iwanek Alicja Wzorek Zdzisława Nowakowska Grzegorz Schroeder 《Monatshefte für Chemie / Chemical Monthly》2009,140(3):359-364
Abstract Synthesis of chelates from selected l-amino acids and triethylborane, and the mass spectra of the chelates, are described. Conditions for forming dimers between
the chelates and the sodium ion are discussed, and structures are proposed for the dimers.
Graphical abstract
相似文献
20.
Zhi-zhong Wang Wei Jiao Guang-yun He Run-hua Lu 《Monatshefte für Chemie / Chemical Monthly》2009,140(1):79-81
Abstract A simple method for the straightforward regioselective synthesis of 2,3-mannoepoxy-β-cyclodextrin, which is a valuable precursor for further functionalization of β-cyclodextrin, is achieved under aqueous conditions without any organic solvents at a moderate yield.
Graphical abstract
相似文献