PYRROLOPHENYLALKANOLAMINES AND THEIR DERIVATIVES,THEIR PREPARATION AND THEIR USE AS YIELD PROMOTERS IN ANIMALS

摘要

Pyrrolophenylalkanolamines of the formula IMAGE R1 and R2 represent hydrogen or various radicals, R3 represents hydrogen, acyl or trialkylsilyl, R4 represents hydrogen or alkyl, R5 represents hydrogen, or, together with R3, represents IMAGE wherein R7 represents hydrogen or alkyl, and R6 represents branched or cyfclic alkyl, which is optionally substituted, and salts thereof promote the yield of animals. Many new intermediates are also shown.