Pharmaceutical Intermediates

The aromatic dianhydride monomer dicarboxyphenoxy group containing 5-bromophthalide structure was prepared, and polymerized with bisether diamine containing trifluoromethyl substituent to prepare a series of organic soluble PEI resins. Films prepared using this resin have excellent optical transparency and heat-resistant stability, with UV cut-off wavelengths below 380nm and Tg above 230°C. The good comprehensive properties make them have good application prospects in the optical field . Some experimenters also used 5-bromophthalide derivative-benzopyrrolidone diphenol (the reaction product of phenolphthalein and aniline) as raw material to prepare double ether diamine monomer, and then polymerized it with dianhydride monomer to prepare a series of phenolphthalein substitutions. PEI. This PEI resin can be dissolved in polar aprotic solvents, as well as solvents such as tetrahydrofuran and chloroform. The prepared PEI film has good heat resistance and stability, with Tg greater than 240°C.

Bromophthalide is a useful starting material for the preparation of certain pharmacologically active substances, including the antidepressant drug citalopram.Market Analysis and Insights: Global 5-Bromophthalide MarketDue to the COVID-19 pandemic, the global 5-Bromophthalide market size is estimated to be worth US$ million in 2022 and is forecast to a readjusted size of US$ million by 2028 with a CAGR of % during the review period. Fully considering the economic change by this health crisis, 98% Purity accounting for % of the 5-Bromophthalide global market in 2021, is projected to value US$ million by 2028, growing at a revised % CAGR in the post-COVID-19 period. While Organic Synthesis segment is altered to an % CAGR throughout this forecast period.China Bromophthalide market size is valued at US$ million in 2021, while the US and Europe Bromophthalide are US$ million and US$ million, severally. The proportion of the US is % in 2021, while China and Europe are % and % respectively, and it is predicted that China proportion will reach % in 2028, trailing a CAGR of % through the analysis period.

The storage of bromobenzene phthalide needs to consider the following points:
1.It needs to be stored in a dry and ventilated warehouse, avoiding moisture, high temperature, and direct sunlight.

2.It is necessary to isolate and store flammable, explosive, and oxidizing materials to prevent the generation of hazardous materials.

3.Smoking and open flames should be prohibited in the storage area, and fire-fighting equipment and detoxification facilities should be installed.

4.Storage containers should be labeled with information such as name, model, weight, and content.

5.The storage time should not be too long, and it should be strictly stored according to the product instructions. Once the expiration date is exceeded, it should be
Handle promptly.

Tri-n-octylaluminium is a compound belonging to the class of organometallic compounds, specifically aluminum alkyls. It is used primarily as a flame retardant and as a catalyst in various chemical reactions. Trioctylaluminum can be used as a pharmaceutical synthesis intermediate. If trioctyl aluminum is inhaled, move the patient to fresh air; if skin contact occurs, take off contaminated clothing and wash the skin thoroughly with soap and water. If you feel uncomfortable, seek medical attention; if contact with eyes occurs, separate Rinse the eyelids with running water or saline and seek medical attention immediately. If ingested, rinse mouth immediately. Do not induce vomiting and seek medical attention immediately.