18023-22-8

Upstream product

• 88-22-2 2-amino-3,5-dimethylbenzenesulfonic acid 
• 22445-41-6 3,5-dimethylphenyl iodide 
• 2905-27-3 3,5-dimethyl-benzenesulfonyl chloride 
• 108-69-0 3,5-dimethylaminoaniline 

Downstream Products

• 141-26-4 3,7-dimethyl-7-octenal 
• 108-68-9 3,5-Dimethylphenol 
• 38360-81-5 3,5-Dimethylthiophenol 

Relevant academic research and scientific papers

Aryl and alkyl sulfonic acid compounds as well as construction method adopting inorganic sulfur salt and application

The invention discloses aryl and alkyl sulfonic acid compounds as shown in a formula (1) and a synthesis method thereof. The method comprises the following step: aromatic iodine and an inorganic sulfur source or alkyl bromide and an inorganic sulfur source as reaction raw materials react in a solvent under the action of alkali, a catalyst or an additive to obtain a series of aryl and alkyl sulfonic acid compounds. According to the method, the aryl and alkyl sulfonic acid compounds are constructed in one step by taking an inorganic sulfur reagent as a sulfur source, so that the defect of the mode in which the aryl and alkyl sulfonic acid compounds are synthesized by taking concentrated sulfuric acid, chlorosulfonic acid or sulfur dioxide gas and the like as sulfonating reagents in the priorart is avoided. The aryl and alkyl sulfonic acid compounds developed by the invention can be used for synthesizing aryl and alkyl sulfonic acid drug analogues.

Sustainable access to sulfonic acids from halides and thiourea dioxide with air

A sustainable and mild one-step strategy is explored for the synthesis of aryl and alkyl sulfonic acids using a facile combination of halides and sulfur dioxide surrogates under air. The cheap industrial material thiourea dioxide was employed as an eco-friendly and easy-handling sulfur dioxide surrogate, while air was used as a green oxidant. Both aryl and alkyl sulfonic acids were obtained under transition metal-catalyzed or transition metal-free conditions. Mechanistic studies demonstrated that sulfinate was involved as an intermediate in this transformation. Notably, this protocol has been applied to the late-stage sulfonation of the drugs naproxen, isoxepac and ibuprofen.

SUBSTITUTED BENZAMIDES AND THEIR USES

Provided herein are Substituted Benzamides, compositions, and method of their manufacture and use.

Process for the sulfonation and/or sulfatization of organic components with SO3 in an organic reaction medium

The invention relates to the use of selected carboxylic acid esters which are liquid under reaction conditions and correspond to general formula (I) in which R1 is an alkyl radical unbranched in the α-position and X is hydrogen or a group corresponding to general formula (II) STR1 in which R2, R3 and R4 represent fluorine and/or chlorine and one of these substituents may also be hydrogen or one or two of these substituents may also be lower alkyl, as reaction medium for the sulfonation and/or sulfatization or organic components with SO3 to light-colored reaction products.