1159813-93-0Relevant articles and documents
Multigram Synthesis of C 4/C5 3,3-Difluorocyclobutyl-Substituted Building Blocks
Melnykov, Kostiantyn P.,Granat, Dmitriy S.,Volochnyuk, Dmitriy M.,Ryabukhin, Sergey V.,Grygorenko, Oleksandr O.
, p. 4949 - 4957 (2018/12/13)
An approach for the multigram synthesis of 3,3-difluorocyclobutyl-substituted building blocks (including carboxylic acid, amines, alcohols, azide, trifluoroborate ketone) is described. It is shown that, in most cases, ethyl 3,3-difluorocyclobutanecarboxylate is a convenient common synthetic intermediate to obtain the target derivatives. For preparation of 3,3-difluorocyclobutanol or -cyclobutanone, an alternative pathway via reaction of dichloroketene and tert -butyl or benzyl vinyl ether should be applied.
9-AMINOMETHYL SUBSTITUTED TETRACYCLINE COMPOUNDS
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Page/Page column, (2014/07/08)
The present invention relates to 9-aminomethyl substituted tetracycline compounds represented by formula (I), or pharmaceutically acceptable salt, prodrug, solvate or isomer thereof, as well as a method for preparing these compounds and a pharmaceutical composition comprising the same. The present invention relates also to a use of these compounds in the preparation of a medicament for the treatment and/or prophylaxis of tetracycline drug-sensitive disease. wherein, R2a, R2b, R3, R4a, R4b, R5, R6a, R6b, R7, R8, R9a, R9b, R10, R11, R12, R13a and R13b are each independently as defined in the description.