Compounds of formula I
in free or salt or solvate form, where R
1
, R
2
and R
5
have the meanings as indicated in the specification, are useful for treating diseases mediated by the ALK-
5
and/or ALK-
4
receptor. Pharmaceutical compositions that contain the compounds and processes for preparing the compounds are also described.
Synthesis and characterization of both enantiomers of trans-1,2-di-(2-hydroxy-2-propyl)-cyclobutane
作者:Frank W. Curtius、Hans-Dieter Scharf
DOI:10.1016/0957-4166(96)00386-2
日期:1996.10
Both enantiomers of the title compound are synthesized for the first time in four steps including a [2+2]-photocycloaddition to build up the cyclobutane backbone and a cerium supported reductive permethylation. During the cerium supported process a complete and selective change in the configuration of the cyclobutane ring takes place. The substituents are transformed from the cis- to the trans-geometry. Copyright (C) 1996 Published by Elsevier Science Ltd
FARINA F.; MARTIN M. R.; MARTIN M. V.; RAMIREZ S., AFINIDAD, 1978, 35, NO 354, 119-122,
作者:FARINA F.、 MARTIN M. R.、 MARTIN M. V.、 RAMIREZ S.