Research progress of STAT3 inhibitors / 药学实践杂志

Signal transducer and activator of transcription 3 (STAT3) is a signal transcription protein that exists in the cytoplasm. The abnormal activation of STAT3 is closely related to cell proliferation, differentiation, and canceration. It has abnormal expression in cancer stem cells such as breast cancer, pancreatic cancer, lymphoma, and lung cancer. Therefore, inhibiting the abnormal expression of STAT3 has become a new approach for antitumor therapy.

Synthesis of the active ingredient rosavin of Rhodiola rosea / 药学实践杂志

Objective To establish the chemical synthesis of the active ingredient rosavin of Rhodiola rosea. Methods β-D-pentaacetylglucose, 1-hydroxy-2,3,4-triacetylarabinose and cinnamyl alcohol were used as starting materials. The target compound was prepared by 1-position selective of β-D-pentaacetylglucose deacetylation, glycosylation reaction, glucose 6-OH selective protection and deprotection and other 8-step reactions. Results The target product, rosavage, was successfully obtained with high yield. The structure was confirmed by ESI-MS, 1H-NMR and 13C-NMR. The protection of 6-OH with high selectivity and high yield of tert-butyldiphenyl chlorosilane played a vital role in the synthesis process,. Conclusion The synthetic route has the advantages of simple operation, high yield, and good safety.