Pentanoyl chloride

Following is an ester type macroazoinimer [51] starting from the poly(ethylene glycol), 4,4 -azobiscy-ano pentanoyl chloride, and methacryloyl chloride. 

Pentanoic acid Thionyl Pentanoyl chloride Sulfur Hydrogen... 

Draw the product formed when pentanoyl chloride (CH3CH2CH2CH2COCI) is treated with each reagent. 

C5H9Br 3-bromo-3-methyl-1 -butene 865-58-7 373.41 32.169 2 5072 C5H9CIO pentanoyl chloride 638-29-9 382.15 32.687 1.2... 

A. Racemic 1,l -bi-2-naphthyl pentanoate. A suspension of 203 g (0.71 mol) of racemic 1,1 -bi-2-naphthol (Note 1) and 215 mL (1.54 mol) of triethylamine in 2 L of ethyl ether is stirred magnetically in a 4-L Erlenmeyer flask. Over a period of 20 min 185 mL (1.56 mol) of pentanoyl chloride is added (Note 2) and the suspension is stirred for an additional hour to ensure complete reaction (Note 3). The mixture is poured into a 6-L separatory funnel and washed twice with 2-L portions of aqueous 1 M sodium bicarbonate and once with a 2-L portion of water resulting in a clear yellow-orange ether solution. 

The initial suspension is thick and can sometimes be difficult to stir magnetically. In this case, occasional swirling by hand is sufficient. The mixture thins as the reaction proceeds. Caution This exothermic reaction causes the ether to boil pentanoyl chloride should be added slowly, allowing the heat of reaction to Ossipate. The checkers cooled the reciction mixture in an ice bath during addition of the add chloride. Pentanoyl chloride was obtained from Aldrich Chemical Company, Ina... 

There is one acid dichloride that is extremely useful oxalyl chloride (157). When 157 reacts with a carboxylic acid such as pentanoic acid (45) in the presence of an amine base (such as triethylamine), the acid is converted to an acid chloride (in this case, pentanoyl chloride, 158). Oxalyl chloride is a very efficient and very mild method for converting acids to acid chlorides. This method should be added to the reactions in Section 20.3 for the preparation of acid chlorides. It is used primarily with acids that are sensitive to acids or bases or when the acid chloride product is too reactive in the presence of acids or bases. 

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