Etiprednol dicloacetate, a new soft glucocorticoid drug candidate. Development of chemistry

During development of chemistry of the soft drug candidate etiprednol dicloacetate (BNP-166) 1) optimization studies on the three-step chemical synthesis resulted in a process that could be scaled-up to the kg level, 2) the impurity profile was determined, 3) synthetic routes were developed for the preparation of the radiolabeled target compound, and 4) a series of hydroxylated metabolites was prepared.

N-substituted trimethylsilylcarbamates as silylating and/or methoxime derivatizing reagents for gas chromatographic analysis

N-Substituted trimethylsilylcarbamates were tested as derivatizing reagents for gas chromatographic analysis. N,N-Dimethyltrimethylsilylcarbamate was found to be a suitable agent for direct trimethylsilylation of the salts of alkaloids without previous liberation of the bases. N-Methoxy-N,O-bistrimethylsilylcarbamate was found to react simultaneously and quantitatively with the hydroxy and keto groups of steroids, resulting in the corresponding methoxime trimethylsilyl derivatives.