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ChemicalBook CAS DataBase List 4-CHLOROCARBONYLPHENYLBORONIC ACID PROPANEDIOL ESTER

4-CHLOROCARBONYLPHENYLBORONIC ACID PROPANEDIOL ESTER synthesis

5synthesis methods
-

Yield:380499-68-3 21.5 g

Reaction Conditions:

in dichloromethane;N,N-dimethyl-formamide at 0 - 20; for 2.33333 h;

Steps:

1 Intermediate 8: N-(pyridin-2-yl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzamide

20 g of 4- (4,4,5,5-tetramethyl-1,3,2-dioxolane-2-yl) benzoic acid is dissolved in 350 ml of dichloromethane,Cool down to 0-5 ° C.Add 1 ml of DMF, dropwise add 16 ml of oxalyl chloride, and stir at 0-5 ° C for 20 min; warm to room temperature and stir for 2 hr.The reaction solution was concentrated and stripped twice with dichloromethane.21.5 g of acid chloride were obtained and used directly in the next reaction.

References:

CN110563733,2019,A Location in patent:Paragraph 0098-0100; 0112-0113