The present invention relates to compounds (reactive conjugates) for the chemical modification of therapeutic antibodies or proteins. The compounds enable the regioselective attachment of payloads to an antibody or antibody fragment in one single step, thereby producing a modified antibody or modified antibody fragment, which can be used for diagnosing, monitoring, imaging or treating disease.
Several pentaalkylguanidines have been prepared and found to be superior catalysts for the preparation of aryl and aralkylethers from carbonates and for the methylation of phenols with dimethylcarbonate. They also act as effective catalysts for esterification of acids with alkyl chloroformates but not for the acetylation of tertiary alcohols with acetic anhydride.
Clean and Efficient Synthesis of Isoxazole Derivatives in Aqueous Media
作者:Guolan Dou、Pan Xu、Qiang Li、Yukun Xi、Zhibin Huang、Daqing Shi
DOI:10.3390/molecules181113645
日期:——
A series of 5-arylisoxazole derivatives were synthesized via the reaction of 3-(dimethyl-amino)-1-arylprop-2-en-1-ones with hydroxylamine hydrochloride in aqueousmedia without using any catalyst. This method has the advantages of easier work-up, mild reaction conditions, high yields, and an environmentally benign procedure.