共查询到20条相似文献,搜索用时 22 毫秒
1.
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
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2.
Madhukar N. Jachak Sandeep M. Bagul Bhausaheb K. Ghotekar Raghunath B. Toche 《Monatshefte für Chemie / Chemical Monthly》2009,140(6):655-662
Abstract A series of (2E)-3-(1-chloro-6-methoxy-3,4-dihydronaphthalen-2-yl)-1-(4-aryl)prop-2-en-1-ones (chalcones) have been synthesized by a new
synthetic route. The 3-pyridinecarbonitrile derivatives were synthesized by the Michael reaction of malononitrile (in base)
and aroylacetonitriles (in acid) with chalcones in one pot. The fluorescent properties and quantum yields of these compounds
were studied.
Graphical Abstract
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3.
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
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4.
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
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5.
Moslem Mansour Lakouraj Masoud Mokhtary 《Monatshefte für Chemie / Chemical Monthly》2009,140(1):53-56
Abstract A Mild and efficient method for preparing amides by reaction of nitriles with benzhydrol and tertiary alcohols is described
using polyvinylpolypyrrolidone-supported boron trifluoride. Selective amidation of benzhydrol in the presence of primary benzyl
alcohols was also achieved.
Graphical abstract
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6.
Maher F. El-Zohry Thanaa A. Mohamed Essam M. Hussein 《Monatshefte für Chemie / Chemical Monthly》2009,140(3):265-272
Abstract 2-Methylbenzimidazole 1 reacted with 3-dicyanomethylidine-1-ethyl-2-oxoindoline 2 in ethyl acetate to afford 1-amino-2-cyano-3,4-dihydro-1′-ethylspiro{benzimidazo[1,2-a]pyridine-3,3′-indolin}-2′-one 6, which was used as a key intermediate in the synthesis of fused spiropolyheterocyclic derivatives of benzimidazopyridopyrimidine
and/or benzimidazonaphthyridine nucleus incorporating an indoline moiety.
Graphical abstract
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7.
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
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8.
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
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9.
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
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10.
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
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11.
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
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12.
Wael A. El-Sayed Ibrahim F. Nassar Adel A.-H. Abdel-Rahman 《Monatshefte für Chemie / Chemical Monthly》2009,140(4):365-370
Abstract New C-furyl glycosides bearing pyrazolines, isoxazolines, and dihydropyrimidine-2(1H)-thiones were synthesized in order to increase the number of tested compounds screened for antimicrobial activity. The antimicrobial
activity screening showed that the pyrazoline derivatives were the most active compounds.
Graphical abstract
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13.
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
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14.
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
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15.
Raghunath B. Toche Bhausaheb K. Ghotekar Muddassar A. Kazi Madhukar N. Jachak 《Monatshefte für Chemie / Chemical Monthly》2009,140(2):235-241
Abstract A novel method for the synthesis of 3-(2-substituted ethyl)-2-methylbenzohetero[3,2-a]pyrimidines in high yield (80–85%) was achieved, which involves a dihydrofuranone intermediate, readily obtained from β-ketolactone
to 2-aminobenzoheterocycles. The major advantage of the methodology is the high yield and product purity.
Graphical Abstract
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16.
Leiv K. Sydnes Karl F. S. Alnes Anita Pettersen Udo H. Brinker 《Monatshefte für Chemie / Chemical Monthly》2009,44(5):479-483
Abstract When the title compounds are thermolyzed in the gas phase under vacuum or in hot quinoline, several products are formed. A
predominant product in all cases is a chlorine-free buta-1,3-diene which has been formed by formal debromochlorination, a
reaction not previously observed during thermolysis of chlorinated bromocyclopropanes.
Graphical Abstract
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17.
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
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18.
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
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19.
Nipawan Pongprom Gerhard Müller Peter Schmidt Wolfgang Holzer Helmut Spreitzer 《Monatshefte für Chemie / Chemical Monthly》2009,140(3):309-313
Abstract A series of carbinols has been synthesized by attachment of different piperidinyl side chains to the quinone structure of
azanaphthoquinone annelated pyrroles. The synthesized compounds were screened for their cytotoxic activities. Compared to
previously published results, they exhibited only moderate activities, thus showing that the existence of the quinone moiety
seems to be essential for anticancer activities of this group.
Graphical abstract
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20.
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
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