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2-Methyl-6-nitrobenzoic anhydride (MNBA) is a versatile dehydrating reagent used in the synthesis of carboxylic esters and lactones, particularly in mixed anhydride methods promoted by basic catalysts like DMAP. It enables high-yield, chemoselective esterification at room temperature, making it suitable for acid-sensitive substrates and complex natural product synthesis, such as erythro-aleuritic acid lactone. MNBA also plays a role in peptide synthesis, as demonstrated in the regioselective esterification during the total synthesis of marinostatin, a potent serine protease inhibitor. Its utility lies in its efficiency and compatibility with diverse functional groups.

434935-69-0

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434935-69-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 434935-69-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,3,4,9,3 and 5 respectively; the second part has 2 digits, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 434935-69:
(8*4)+(7*3)+(6*4)+(5*9)+(4*3)+(3*5)+(2*6)+(1*9)=170
170 % 10 = 0
So 434935-69-0 is a valid CAS Registry Number.
InChI:InChI=1/C16H12N2O7/c1-9-5-3-7-11(17(21)22)13(9)15(19)25-16(20)14-10(2)6-4-8-12(14)18(23)24/h3-8H,1-2H3

434935-69-0 Well-known Company Product Price

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  • TCI America

  • (M1439)  2-Methyl-6-nitrobenzoic Anhydride  >98.0%(T)

  • 434935-69-0

  • 1g

  • 490.00CNY

  • Detail
  • TCI America

  • (M1439)  2-Methyl-6-nitrobenzoic Anhydride  >98.0%(T)

  • 434935-69-0

  • 5g

  • 1,490.00CNY

  • Detail
  • TCI America

  • (M1439)  2-Methyl-6-nitrobenzoic Anhydride  >98.0%(T)

  • 434935-69-0

  • 25g

  • 3,990.00CNY

  • Detail
  • Aldrich

  • (681059)  2-Methyl-6-nitrobenzoicanhydride  97%

  • 434935-69-0

  • 681059-1G

  • 582.66CNY

  • Detail
  • Aldrich

  • (681059)  2-Methyl-6-nitrobenzoicanhydride  97%

  • 434935-69-0

  • 681059-10G

  • 3,285.36CNY

  • Detail

434935-69-0SDS

SAFETY DATA SHEETS

According to Globally Harmonized System of Classification and Labelling of Chemicals (GHS) - Sixth revised edition

Version: 1.0

Creation Date: Aug 17, 2017

Revision Date: Aug 17, 2017

1.Identification

1.1 GHS Product identifier

Product name 2-Methyl-6-Nitrobenzoic Anhydride

1.2 Other means of identification

Product number -
Other names (2-methyl-6-nitrobenzoyl) 2-methyl-6-nitrobenzoate

1.3 Recommended use of the chemical and restrictions on use

Identified uses For industry use only.
Uses advised against no data available

1.4 Supplier's details

1.5 Emergency phone number

Emergency phone number -
Service hours Monday to Friday, 9am-5pm (Standard time zone: UTC/GMT +8 hours).

More Details:434935-69-0 SDS

434935-69-0Relevant academic research and scientific papers

2,6-Dimethyl-4-nitrobenzoic anhydride (DMNBA): An effective coupling reagent for the synthesis of carboxylic esters and lactones

Shiina, Isamu,Miyao, Ryo

experimental part, p. 1313 - 1328 (2009/07/05)

Various carboxylic esters are obtained at room temperature in excellent yields with high chemoselectivities from nearly equimolar amounts of carboxylic acids and alcohols using 2,6-dimethyl-4-nitrobenzoic anhydride with triethylamine by the promotion of 4-(dimethylamino)pyridine. The efficiency of the esterification is compared to those of other dehydrations using substituted benzoic anhydrides as coupling reagents. This method was successfully applied to the synthesis of threo-aleuritic acid lactone and the desired 17-membered ring compound was prepared in high yield at room temperature from the corresponding free trihydroxycarboxylic acid using 2,6-dimethyl-4-nitrobenzoic anhydride in the presence of 4-(dimethylamino)pyridine.

An Effective Use of Benzoic Anhydride and Its Derivatives for the Synthesis of Carboxylic Esters and Lactones: A Powerful and Convenient Mixed Anhydride Method Promoted by Basic Catalysts

Shiina, Isamu,Kubota, Mari,Oshiumi, Hiromi,Hashizume, Minako

, p. 1822 - 1830 (2007/10/03)

Various carboxylic esters are obtained at room temperature in excellent yields with high chemoselectivities from nearly equimolar amounts of carboxylic acids and alcohols using 2-methyl-6-nitrobenzoic anhydride with triethylamine by the promotion of a basic catalyst such as 4-(dimethylamino)pyridine. A variety of lactones are also prepared in high yields at room temperature from the corresponding ω-hydroxycarboxylic acids with use of 2-methyl-6-nitrobenzoic anhydride in the presence of 4-(dimethylamino)pyridine. A similar reaction occurs with triethylamine when using a catalytic amount of 4-(dimethylamino)pyridine 1-oxide as an effective promoter for the intramolecular condensation reaction. These methods are successfully applied to the synthesis of erythro-aleuritic acid lactone and an eight-membered-ring lactone moiety of octalactins A and B. The efficiency of the cyclizations is compared to those of other reported lactonizations.

A novel and efficient macrolactonization of ω-hydroxycarboxylic acids using 2-methyl-6-nitrobenzoic anhydride (MNBA)

Shiina, Isamu,Kubota, Mari,Ibuka, Ryoutarou

, p. 7535 - 7539 (2007/10/03)

A variety of lactones were prepared in high yields at room temperature from the corresponding ω-hydroxycarboxylic acids using 2-methyl-6-nitrobenzoic anhydride in the presence of 4-(dimethylamino)pyridine. A similar reaction also occurs with triethylamine when using a catalytic amount of 4-(dimethylamino)pyridine 1-oxide as an effective promoter for the intramolecular condensation reaction. These methods were successfully applied to the synthesis of erythro-aleuritic acid lactone and the efficiency of the cyclizations is compared to those of other reported mixed anhydride methods.

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