- Preparation method of terbutaline sulphate
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The invention relates to a preparation method of terbutaline sulphate. The technical problems that according to an existing preparation method of terbutaline sulphate, high-pressure hydrogenation and other high-risk operations, and lithium methide, azomethane and other high-risk reagents exist, and cost is high are solved through the preparation method. 3,5-resacetophenone serves as a raw material, and terbutaline sulphate is obtained through hydroxyl protection, the bromination reaction, carbonyl reduction, the condensation reaction and sulphating. The preparation method can be suitable for industrially-produced terbutaline sulphate.
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Paragraph 0023; 0024; 0028-0030; 0034-0036
(2017/01/17)
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- PREPARATION METHOD OF ACYLBENZENES
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A process for the production of acylbenzenes, comprising reacting diacetoxybenzoyl chloride with a Grignard reagent in the presence of an iron-containing catalyst. The acylbenzenes are useful intermediates in a multistep process for the preparation of resveratrol.
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- PREPARATION METHOD OF ACYLBENZENES
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A process for the production of acylbenzenes, comprising reacting diacetoxybenzoyl chloride with a Grignard reagent in the presence of an iron-containing catalyst. The acylbenzenes are useful intermediates in a multistep process for the preparation of resveratrol.
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- Al(OTf)3 as a highly efficient catalyst for the rapid acetylation of alcohols, phenols and thiophenols under solvent-free conditions
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Aluminium triflate (0.01-0.1 mol %) was found to be an efficient catalyst for the acylation of alcohols, phenols, thiols and sugars with acetic anhydride in high yields under solvent-free conditions in a short reaction time at room temperature. Racemization of optically active alcohols and epimerization of sugars were not observed. The acylation efficacy of various acyl donors was also investigated.
- Kamal, Ahmed,Khan, M. Naseer A.,Reddy, K. Srinivasa,Srikanth,Krishnaji
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p. 3813 - 3818
(2008/02/06)
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