Examples of 'dimethyl acetal' in a sentence
Meaning of "dimethyl acetal"
dimethyl acetal: Dimethyl acetal is a chemical compound that is commonly used as a protecting group in organic synthesis to prevent unwanted reactions at specific sites on molecules. It is often employed in the preparation or modification of various organic compounds
How to use "dimethyl acetal" in a sentence
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dimethyl acetal
Generally triethyl orthoformate or dimethylformamide dimethyl acetal are used.
It is the dimethyl acetal of formaldehyde.
Coevaporation with toluene removed the excess dimethylformamide dimethyl acetal.
The excess aminoacetaldehyde dimethyl acetal is removed by vacuum distillation.
Such a reaction advantageously proceeds in the presence of an excess of dimethylformamide dimethyl acetal.
Citral dimethyl acetal.
The resulting heteroaromatic acetaldehyde can then be converted to the corresponding dimethyl acetal.
Acetone dimethyl acetal.
The resulting heteroaromatic aldehyde can then be converted to the corresponding heteroaromatic dimethyl acetal.
As the dimethyl acetal.
Under protic conditions, ketones undergo α-hydroxylation and dimethyl acetal formation.
For example, acetaldehyde dimethyl acetal and dimethylaminoacetaldehyde dimethyl acetal may be used.
Alternatively, compound u may be reacted with dimethylformamide dimethyl acetal to yield acetamidine compound x.
The dimethyl acetal of ethyl 4-oxobutyrate is the starting material in accordance with this scheme.
Subsequent protection of the diol using p-anisaldehyde dimethyl acetal provides epoxide iii.
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This dimethyl acetal is readily hydrolyzed under standard acidic conditions to provide aldehyde ( 20a ).
Heats of hydrolysis of N-methylformanilide dimethyl acetal have been measured in basic solution.
A functional derivative of a compound of formula III is preferably a di-lower alkyl acetal, especially dimethyl acetal.
Monoalkylation with 2-bromoacetaldehyde dimethyl acetal and subsequent addition of isocyanates give VII.
The acetal / ketal is in particular 2-aminoacetaldehyde dimethyl acetal.
However, 3-bromopropionaldehyde dimethyl acetal was used instead of bromoacetaldehyde diethyl acetal.
The inventers have done protection using N, N - dimethylformamide dimethyl acetal in the presence of DMF.
Bromoacetaldehyde dimethyl acetal ( 5.45 mL ) was added dropwise to the reaction solution at the same temperature.
Dimethoxyethane; dimethyl acetal.
For example, it may be prepared by reacting a 2-nitrotoluene with dimethylformamide dimethyl acetal.
Examples of suitable acetal compounds are 4-aminobutyraldehyde dimethyl acetal and 4-aminobutyraldehyde diethyl acetal.
Desoxybenzoin 48 is then converted to ketone 49 by treatment with an excess of dimethylformamide dimethyl acetal.
The condensation of cleistopholine with dimethylformamide dimethyl acetal provided sampangine ( 4 ) in 79 % yield.
A process according to claim 7, wherein the hydroxy-amine of Formula 3 is reacted with 2,4-dimethoxybenzaldehyde dimethyl acetal.
The N, N-dimethylformamide dimethyl acetal [ 2 equivalents ( eqs ) ] is added to the solution at room temperature.
Alternatively, compound 1e may be reacted with dimethylformamide dimethyl acetal to yield urea compound 1h.
Step 1 is a method of substituting Compound ( 3-a ) with aminoacetaldehyde dimethyl acetal.
Methylpyridine 1 can be treated with N, N - dimethylformamide dimethyl acetal to give vinylamine 2.
The residue was refluxed for 2 hours in 10 mL of N, N-dimethylacetamide dimethyl acetal.
A total of three 2.6 g ( 10 mmole ) quantities of a a-hexylcinnamylaldehyde dimethyl acetal were added in one hour intervals.
The process of embodiment 9, wherein the amine-protecting agent is N, N-dimethylformamide dimethyl acetal.
Consecutive alkylations with bromoacetaldehyde dimethyl acetal and R2-X gives 33.
To the residue was added dichloromethane, followed by N, N - dimethylformamide dimethyl acetal ( 5 ml ).
Carboxamide 69 is converted to its methyl ester 70 by reaction with dimethylformamide dimethyl acetal in methanol.
Concentration of the reaction mixture under vacuum provides the intermediate dimethyl acetal of aldehyde ( 3 ).
The first step is the formation of an enamine 2 using N, N-dimethylformamide dimethyl acetal and pyrrolidine.
The synthesis of ( ± ) - epiisopodophyllotoxin commencing with 6-bromopiperonal dimethyl acetal is described.
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Examples of using Acetal
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The cyclic acetal compounds were synthesized as follows
No aromatic or heteroaromatic moiety as a component of an ester or acetal
The acetal groups are prepared by known techniques
